全文获取类型
收费全文 | 11720篇 |
免费 | 688篇 |
国内免费 | 71篇 |
专业分类
耳鼻咽喉 | 66篇 |
儿科学 | 360篇 |
妇产科学 | 249篇 |
基础医学 | 1993篇 |
口腔科学 | 111篇 |
临床医学 | 1132篇 |
内科学 | 2902篇 |
皮肤病学 | 191篇 |
神经病学 | 1032篇 |
特种医学 | 295篇 |
外科学 | 1589篇 |
综合类 | 35篇 |
现状与发展 | 1篇 |
一般理论 | 9篇 |
预防医学 | 715篇 |
眼科学 | 79篇 |
药学 | 743篇 |
中国医学 | 21篇 |
肿瘤学 | 956篇 |
出版年
2024年 | 9篇 |
2023年 | 53篇 |
2022年 | 104篇 |
2021年 | 248篇 |
2020年 | 160篇 |
2019年 | 238篇 |
2018年 | 278篇 |
2017年 | 183篇 |
2016年 | 219篇 |
2015年 | 239篇 |
2014年 | 377篇 |
2013年 | 508篇 |
2012年 | 845篇 |
2011年 | 898篇 |
2010年 | 492篇 |
2009年 | 499篇 |
2008年 | 809篇 |
2007年 | 864篇 |
2006年 | 852篇 |
2005年 | 913篇 |
2004年 | 867篇 |
2003年 | 809篇 |
2002年 | 772篇 |
2001年 | 86篇 |
2000年 | 39篇 |
1999年 | 110篇 |
1998年 | 168篇 |
1997年 | 123篇 |
1996年 | 89篇 |
1995年 | 94篇 |
1994年 | 74篇 |
1993年 | 77篇 |
1992年 | 40篇 |
1991年 | 40篇 |
1990年 | 36篇 |
1989年 | 28篇 |
1988年 | 27篇 |
1987年 | 33篇 |
1986年 | 26篇 |
1985年 | 8篇 |
1984年 | 16篇 |
1983年 | 19篇 |
1982年 | 15篇 |
1981年 | 22篇 |
1980年 | 27篇 |
1979年 | 9篇 |
1978年 | 7篇 |
1977年 | 8篇 |
1976年 | 5篇 |
1968年 | 3篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
Quality of Life of People with Epilepsy: A European Study 总被引:18,自引:18,他引:18
Gus A. Baker Ann Jacoby Deborah Buck Carlos Stalgis † Dominique Monnet† 《Epilepsia》1997,38(3):353-362
Summary: Purpose: To study the impact of epilepsy and its treatment on people with epilepsy in Europe. We therefore aimed to collect data from as many countries as possible.
Methods: Clinical and demographic details and information about psychosocial functioning was collected using self-completed questionnaires mailed to members of epilepsy support groups.
Results: Quality of life data was collected from >5,000 patients living in 15 countries in Europe. Over a third of all respondents had frequent seizures, and a fifth believed that their seizures were not well enough controlled by antiepileptic medication. Reported levels of side effects from medication were high. A significant number of respondents reported changing their medication because of side effects or poor control. Respondents reported that epilepsy and its treatment had a significant impact on a number of different aspects of their daily lives. Half of all respondents felt stigmatised by their epilepsy. There were significant differences by seizure type and frequency in the way respondents scored on measures of the perceived impact of their condition, the stigma associated with it and their health status as measured by a generic scale, the SF36.
Conclusions: This study confirms the findings of previous smaller-scale studies that reducing side effects and achieving better control of seizures are key to improving the quality of life of people with epilepsy, as is reducing the stigma and handicap associated with it. 相似文献
Methods: Clinical and demographic details and information about psychosocial functioning was collected using self-completed questionnaires mailed to members of epilepsy support groups.
Results: Quality of life data was collected from >5,000 patients living in 15 countries in Europe. Over a third of all respondents had frequent seizures, and a fifth believed that their seizures were not well enough controlled by antiepileptic medication. Reported levels of side effects from medication were high. A significant number of respondents reported changing their medication because of side effects or poor control. Respondents reported that epilepsy and its treatment had a significant impact on a number of different aspects of their daily lives. Half of all respondents felt stigmatised by their epilepsy. There were significant differences by seizure type and frequency in the way respondents scored on measures of the perceived impact of their condition, the stigma associated with it and their health status as measured by a generic scale, the SF36.
Conclusions: This study confirms the findings of previous smaller-scale studies that reducing side effects and achieving better control of seizures are key to improving the quality of life of people with epilepsy, as is reducing the stigma and handicap associated with it. 相似文献
72.
Xueref S Holianjavony J Daniel R Kerouedan D Fabry J Vanhems P 《Tropical medicine & international health : TM & IH》2003,8(1):60-66
In a cross-sectional study in 1998 we assessed human immunodeficiency virus (HIV) and syphilis infections and their risk factors among the 316 registered female sex workers (FSWs) of Toliary, south-west Madagascar. No case of HIV infection was detected, but 18.4% of registered FSWs had syphilis. Only half of these women regularly used condoms. In a multiple logistic regression analysis, risk factors for syphilis infection were multiple clients per week and, paradoxically, regular use of condoms. The variables associated with irregular use of condoms were younger ages of registered FSWs, multiple clients per week and Malagasy clients. The high prevalence of syphilis infection associated with irregular use of condoms might facilitate a very fast spread of HIV infection among these FSWs. Promotion of condom use and surveillance of sexually transmitted infections and HIV infection incidence are needed in the south of Madagascar. 相似文献
73.
Olivier Chavanon Lionel Carrat Céline Pasqualini Emmanuel Dubois Dominique Blin Jocelyne Troccaz 《Herz》2000,1(4):761-768
Percutaneous pericardial puncture is a relatively safe and effective technique in case of large pericardial effusions when practiced under echographic or radiological control. The goal of our project is to improve the performance of this technique, mainly in case of smaller and loculated effusions using an accurate guidance towards a preplanned target, based on a model of the pericardial effusion. This paper presents preclinical results of this new computer-assisted technique used to reach the pericardial cavity. The procedure is divide into 3 steps: 1. acquisition of ultrasound data, using an echocardiographic device connected to a 3-D localizer and to a computer, 2. modeling procecure to define the optimal strategy taking into account the mobility of organs on a digital model, 3. guided puncture with a localized needle to reach the predefined target using a passive guidance system. After validation on a dynamic phantom and a feasibility study on dogs, an accuracy and reliability analysis protocol was realized on pigs with experimental pericardial effusion. Feasibility of the technique is demonstrated on animal study with an accuracy of at least 2.5 mm. Further clinical investigation is in progress using a more ergonomic and less cumbersome system. This study demonstrates the feasibility of computer-assisted pericardiocentesis. Beyond the simple improvement of the current technique, this could be a new way to reach the heart or a new tool for percutaneous access and image-guided puncture of soft tissues. Zusammenfassung Die perkutane Perikardpunktion ist ein relativ sicheres und wirksames Therapieverfahren bei größeren Perikardergüssen, wenn sie unter echokardiographischer oder radiologischer Kontrolle erfolgt. Das Ziel einer computergestützten Perikardpunktion ist es, die Punktionstechnik zu verbessern und insbesondere bei kleinen und gekammerten Perikardergüssen eine gezielte Punktion vornehmen zu können. Die Untersuchungen sind Modellversuche einer Perikardpunktion im Sinne präklinischer Datenerhebung. Eine Perikardpunktion mit Computerunterstützung lässt sich in drei Schritte aufteilen: 1. echokardiographische Datenerhebung im 3-D-Format, die in einen Computer eingespeist werden, 2. Wandlung der Daten in ein digitales Modell und 3. gezielte Punktion mit einer computermäßig lokalisierbaren Nadel, um das ausgewählte Ziel (lokalisierter Perikarderguss) zu erreichen. Nach Untersuchungen an einem dynamischen Phantom sowie einer weiteren Untersuchung an Hunden wurden Genauigkeit und Verlässlichkeit des Systems an Schweinen mit einer experimentell induzierten Perikarditis geprüft. Mit Hilfe des Systems kann die Punktion mit einer Genauigkeit von mindestens 2,5 mm erfolgen. Diesen Untersuchungen folgt gegenwärtig eine klinische Erprobungsphase an Patienten mit einem für die Klinik geeigneteren Prototypen. Die Untersuchung zeigt, dass eine computergesteuerte Perikardpunktion durchführbar ist. Sie stellt darüber hinaus eine Perspektive für einen perkutanen Zugang zum Perikard mit gezielter Punktion dar und lässt sich auch an anderen Punktionsorten anwenden. 相似文献
74.
Brett M. Forshey Allison Stewart Amy C. Morrison Hugo G��lvez Claudio Rocha Helvio Astete Dominique Eza Hua-Wei Chen Chien-Chung Chao Joel M. Montgomery David E. Bentzel Wei-Mei Ching Tadeusz J. Kochel 《The American journal of tropical medicine and hygiene》2010,82(4):683-690
A seroprevalence study for IgG antibodies against spotted fever group (SFGR) and typhus group (TGR) Rickettsia among humans and domestic pets was conducted in the city of Iquitos, located in the Amazon basin of Peru. Of 1,195 human sera analyzed, 521 (43.6%) and 123 (10.3%) were positive for SFGR and TGR antibodies, respectively. District of residence and participant age were associated with antibody positivity for both groups, whereas rodent sightings in the home were associated with TGR antibody positivity. Of the 71 canines tested, 42 (59.2%) were positive for SFGR antibodies, and two (2.8%) were positive for TGR antibodies; one active SFGR infection was detected by polymerase chain reaction. An uncharacterized SFGR species was detected in 95.9% (71/74) of Ctenocephalides felis pools collected from domestic pets. These data suggest that rickettsial transmission is widespread in Iquitos. Rickettsia species should be further explored as potential causes of acute febrile illnesses in the region. 相似文献
75.
Mertens I Ballaux D Funahashi T Matsuzawa Y Van der Planken M Verrijken A Ruige JB Van Gaal LF 《Thrombosis and haemostasis》2005,94(6):1190-1195
Adipose tissue is an active endocrine organ secreting different adipokines such as plasminogen activator inhibitor-1 (PAI-1) and adiponectin, among many others. In this study, we investigated the association between PAI-1 activity and serum adiponectin levels in a group of 444 overweight and obese women and assessed the interrelationship with visceral adipose tissue (VAT; CT-scan L4-L5), insulin resistance (HOMA-IR), HDL cholesterol (HDL-chol) and inflammation (hs-CRP). PAI-1 was inversely related to adiponectin (r = -0.25, p < 0.001; adjusted for age and BMI). After adjustment for age, VAT, HOMA-IR and hs-CRP, the relationship remained significant (r = -0.15; p = 0.001), but disappeared after additional adjustment for HDL-chol (r = -0.09; p = 0.067). Subjects were divided in two groups according to the median levels of adiponectin or PAI-1 levels. PAI-1 activity (19.1 +/- 11.4 vs. 15.8 +/- 8.6 AU/ml; p = 0.003) and adiponectin levels (9.8 +/- 4.6 vs. 8.4 +/- 4.0 microg/ml; p < 0.001) were significantly higher in the low adiponectin/PAI-1 groups. The difference in PAI-1 remained significant after adjustment for age and BMI (p = 0.001), became borderline significant after adjustment for age and VAT (p = 0.052), and disappeared after adjustment for age and HOMA-IR (p = 0.116) or age and HDL-chol (p = 0.443). The difference in adiponectin levels remained significant after adjustment for age, VAT, HOMA-IR and hs-CRP (p = 0.006), but disappeared after additional adjustment for HDL-chol (p = 0.089). Further analyses suggest a contribution of HOMA-IR and/or HDL-chol in the relationship between PAI-1 and adiponectin. HDL-chol was found to be the only factor independently determining both factors. In conclusion, in overweight and obese women, PAI-1 activity was inversely related to serum adiponectin, independent of visceral adipose tissue. 相似文献
76.
77.
78.
Christophe Borg Georges Mantion Frank Boudghène Françoise Mornex François Ghiringhelli Antoine Adenis David Azria Jacques Balosso Meher Ben Abdelghani Jean Baptiste Bachet Véronique Vendrely Yves François Thierry Conroy Emmanuel Rio Bernard Roullet Dominique Spaëth Laurent Quero Zaher Lakkis Thierry André 《Clinical colorectal cancer》2019,18(3):200-208.e1
BackgroundRecurrence and distant metastases remain a significant issue in locally advanced rectal cancer (LARC). Several multimodal strategies are assessed in clinical trials.Patients and MethodsPatients with mid/low magnetic resonance imaging–defined high-risk LARC were randomized to arm A (12-week bevacizumab + FOLFOX-4 then bevacizumab–5-fluorouracil [5-FU]–radiotherapy [RT] before total mesorectal excision [TME]) or arm B (bevacizumab-5-FU–RT then TME). Long-term efficacy and safety up to 5 years’ follow-up are reported. No comparison between arms was planned.ResultsOverall, 91 patients (46 in arm A and 45 in arm B) were included. Main results have been presented previously. During the late follow-up period (> 4 weeks after surgery), 4 patients (8.7%) in arm A and 4 (8.9%) in arm B experienced grade 3/4 adverse events related to bevacizumab; the most frequent were 2 anastomotic fistulas (both in arm A) and abscesses (1 in arm A and 2 in arm B). At 5 years’ follow-up, 9 (19.6%) and 11 (24.4%) patients in arms A and B developed a fistula in the year after surgery, and 2 (4.3%) in arm A at > 1 year after surgery. Most resolved before study end. Five-year disease-free survival was 70% and 64.3% in arms A and B, respectively. Five-year overall survival was 90.5% (95% confidence interval, 76.7, 96.3) in arm A and 72.7% (95% confidence interval, 56.0, 83.9) in arm B.ConclusionNeoadjuvant bevacizumab + FOLFOX-4 may have the potential to increase survival outcomes when followed by bevacizumab–5-FU–RT and TME in LARC. Bevacizumab–5-FU–RT then TME was associated with a higher-than-projected rate of anastomotic fistulas. Further research of neoadjuvant strategies in LARC is encouraged. 相似文献
79.
80.
Lefebvre d'Hellencourt C Montero-Menei CN Bernard R Couez D 《Journal of neuroscience research》2003,71(4):575-582
In recent years, a neuroimmunomodulatory role for 1,25-dihydroxyvitamine D(3) [1,25(OH)(2)D(3)] has emerged. Microglial cells present a potential target for the effects of this hormone in the brain. This study focuses on the effect of 1,25(OH)(2)D(3) on the expression and production of inflammatory cytokines and nitric oxide (NO) by the EOC13 microglial cell line. The presence of the vitamin D3 receptor in microglia was demonstrated by RT-PCR. 1,25(OH)(2)D(3) inhibited the production of tumor necrosis factor-alpha, interleukin-6, and NO by stimulated microglia in a concentration-related fashion. The production of transforming growth factor-beta1 (TGF-beta1), an anti-inflammatory cytokine, was not modified in the presence of 1,25(OH)(2)D(3), indicating that the effects of 1,25(OH)(2)D(3) may not involve TGF-beta1 regulation. These results show that 1,25(OH)(2)D(3) has direct anti-inflammatory properties on microglia. It further supports the hypothesis that 1,25(OH)(2)D(3) could be involved in the maintenance of the brain homeostasis and may have a therapeutic potential in inflammatory pathologies of the central nervous system. 相似文献