全文获取类型
收费全文 | 18416篇 |
免费 | 846篇 |
国内免费 | 40篇 |
专业分类
耳鼻咽喉 | 248篇 |
儿科学 | 411篇 |
妇产科学 | 418篇 |
基础医学 | 2803篇 |
口腔科学 | 422篇 |
临床医学 | 1428篇 |
内科学 | 3617篇 |
皮肤病学 | 473篇 |
神经病学 | 1792篇 |
特种医学 | 1084篇 |
外国民族医学 | 2篇 |
外科学 | 2563篇 |
综合类 | 117篇 |
一般理论 | 3篇 |
预防医学 | 891篇 |
眼科学 | 416篇 |
药学 | 1567篇 |
中国医学 | 71篇 |
肿瘤学 | 976篇 |
出版年
2021年 | 193篇 |
2020年 | 160篇 |
2019年 | 178篇 |
2018年 | 316篇 |
2017年 | 244篇 |
2016年 | 315篇 |
2015年 | 424篇 |
2014年 | 500篇 |
2013年 | 614篇 |
2012年 | 917篇 |
2011年 | 1037篇 |
2010年 | 597篇 |
2009年 | 534篇 |
2008年 | 938篇 |
2007年 | 987篇 |
2006年 | 993篇 |
2005年 | 966篇 |
2004年 | 961篇 |
2003年 | 903篇 |
2002年 | 954篇 |
2001年 | 405篇 |
2000年 | 419篇 |
1999年 | 429篇 |
1998年 | 216篇 |
1997年 | 193篇 |
1996年 | 154篇 |
1995年 | 127篇 |
1994年 | 128篇 |
1993年 | 129篇 |
1992年 | 200篇 |
1991年 | 178篇 |
1990年 | 164篇 |
1989年 | 190篇 |
1988年 | 152篇 |
1987年 | 149篇 |
1986年 | 143篇 |
1985年 | 152篇 |
1984年 | 113篇 |
1983年 | 108篇 |
1982年 | 104篇 |
1981年 | 102篇 |
1979年 | 129篇 |
1978年 | 97篇 |
1977年 | 117篇 |
1976年 | 98篇 |
1975年 | 109篇 |
1974年 | 108篇 |
1973年 | 103篇 |
1972年 | 97篇 |
1969年 | 90篇 |
排序方式: 共有10000条查询结果,搜索用时 640 毫秒
1.
Troppmair Teresa Egger J. Krösbacher A. Zanvettor A. Schinnerl A. Neumayr A. Baubin M. 《Der Anaesthesist》2022,71(4):272-280
Die Anaesthesiologie - Die Qualität eines Rettungssystems zeichnet sich auch durch den effizienten Einsatz seiner personellen und Fahrzeugressourcen aus. So können im berechtigten Fall... 相似文献
2.
3.
4.
5.
6.
Christer Lunde Gjerstad Hans Jakob Bøe Erik Falkum Egil Wilhelm Martinsen Andreas Espetvedt Nordstrand Arnfinn Tønnesen Jon Gerhard Reichelt June Ullevoldsæter Lystad 《Journal of traumatic stress》2020,33(5):762-772
Peacekeeping missions involve experiences that may impact the mental health of participating soldiers. However, research on the long-term mental health consequences of peacekeeping is sparse. The present study aimed to find the prevalence of mental health problems (MHPs), possible MHP predictors, and associations between predictors and MHPs in Norwegian peacekeepers 18–38 years after deployment to a United Nations peacekeeping mission. We used data from a cross-sectional, postdeployment survey of Norwegian peacekeepers who served in Lebanon between 1978 and 1998 (N = 10,605). Participants were assessed for posttraumatic stress disorder (PTSD); anxiety; depression; insomnia; alcohol misuse; drug misuse; and exposure to pre-, peri-, and postdeployment stressors. Logistic regressions were executed to explore key variables associated with MHPs. Total MHP prevalence was 15.1%, 95% CI [14.4, 15.8]. The estimates for specific disorders were 0.1% for drug misuse, 3.4% for alcohol misuse, 4.0% for depression, 6.2% for PTSD, 6.4% for anxiety, and 9.3% for insomnia. Postdeployment stressors, OR = 1.91, 95% CI [1.79, 2.04]; employment status, OR = 1.41, 95% CI [1.33, 1.48]; and traumatic exposure during deployment, OR = 1.11, 95% CI [1.09, 1.12], were positively related to PTSD, χ2(17, N = 8,568) = 1,791.299, p < .001. Similar patterns were found for the other MHPs. Considering that most participants (84.9%) reported low symptom levels, our findings challenge the widespread public perception that most peacekeepers have MHPs. Moreover, our results indicate that future peacekeepers should be prepared for challenges they may face not only during deployment but also in the years following their homecoming. 相似文献
7.
Dr. H. Ptok R. Steinert F. Meyer K.-P. Kröll C. Scheele F. Köckerling I. Gastinger H. Lippert 《Der Chirurg》2006,77(8):709-717
BACKGROUND: The laparoscopic resection of rectal cancer shows morbidity and oncological safety comparable to the open approach, but morbidity increases after conversion to open resection. No oncological long-term results are available for the latter patients. METHODS: From 01/01/2000-31/12/2002, patients with curatively resected rectal cancer enrolled in a observational study were evaluated for morbidity, mortality, tumor- and local recurrence rate, paying attention to patients with conversion from laparoscopic to open resection. RESULTS: 237 (3.3%) of 7,189 patients underwent laparoscopic resection (ITT). These patients showed significantly more T1/2 tumors (P<0.001) in earlier UICC stages (P<0.001) than open resected patients. 35 (14.8%) of 237 laparoscopic procedures were converted. Compared with patients receiving complete laparoscopic or open resection, these patients showed significantly higher frequencies of intraoperative (P<0.001) and general postoperative complications (P=0.003) as well as the highest overall morbidity (P=0.031). After a median follow-up of 30.1 months, the highest 5-year local recurrence rate was found in the converted group (16.0%). The laparoscopically resected patients showed a local recurrence rate of 3.3%, patients with open resection of 12.4% (P=0.082). The disease-free survival rate did not differ between the groups (P=0.585). CONCLUSION: Laparoscopic resection of rectal cancer provides oncological results similar to open resection. After conversion, the short and oncological long-term outcomes were worse. Considering a conversion rate of 15%, only a strict indication for the laparoscopic approach can be allowed, and laparoscopic resection should be performed at centers. 相似文献
8.
9.
Jean-Sébastien Fallu Jürgen Rehm Emmanuel N. Kuntsche Esther Grichting Neerav Monga Edward M. Adlaf Susan J Bondy Gerhard Gmel 《Sozial- und Pr?ventivmedizin》2006,8(1):363-372
Volume and profile of alcohol consumption among students and classmates as predictors of aggression and victimization: a multilevel
analysis among Swiss adolescents
Objective:
To test the effects of the volume of alcohol consumption and drinking patterns on alcohol-related aggression and victimization, both at the individual and class levels. 相似文献10.
Renal fibrosis and the origin of the renal fibroblast. 总被引:4,自引:0,他引:4
Many studies have determined that the extent of tubulointerstitialinvolvement, particularly fibrosis, correlates better with renalfunction than glomerular changes do, thus, the extent of tubulointerstitialdamage in any given renal biopsy has important implicationsfor the renal prognosis of the patient (summarized in [1]).Tubulointerstitial fibrosis is characterized by the accumulationof extracellular matrix components including collagen typesI, III, IV, proteoglycans and fibronectin. In recent years,much controversy has been created in the nephrology communityregarding the origin of matrix-producing cells in the kidney.Several possibilities exist, including activation of residentinterstitial fibroblasts, migrating haematopoietic or mesenchymalstem cells from the bone marrow, periadventitial cells and epithelialmesenchymaltransition (EMT) of tubular epithelial cells. This review summarizesrecent data indicating the possible origin of matrix-producingcells in the kidney, and illustrates from a clinical point of 相似文献