全文获取类型
收费全文 | 1535963篇 |
免费 | 116227篇 |
国内免费 | 6408篇 |
专业分类
耳鼻咽喉 | 18236篇 |
儿科学 | 50186篇 |
妇产科学 | 40081篇 |
基础医学 | 205401篇 |
口腔科学 | 38943篇 |
临床医学 | 134166篇 |
内科学 | 313966篇 |
皮肤病学 | 33011篇 |
神经病学 | 128290篇 |
特种医学 | 65170篇 |
外国民族医学 | 275篇 |
外科学 | 243659篇 |
综合类 | 34189篇 |
现状与发展 | 2篇 |
一般理论 | 419篇 |
预防医学 | 126200篇 |
眼科学 | 31081篇 |
药学 | 104634篇 |
5篇 | |
中国医学 | 2918篇 |
肿瘤学 | 87766篇 |
出版年
2018年 | 36126篇 |
2017年 | 28773篇 |
2016年 | 34013篇 |
2015年 | 15613篇 |
2014年 | 21216篇 |
2013年 | 31076篇 |
2012年 | 43837篇 |
2011年 | 61173篇 |
2010年 | 43763篇 |
2009年 | 36218篇 |
2008年 | 57821篇 |
2007年 | 63566篇 |
2006年 | 40931篇 |
2005年 | 41679篇 |
2004年 | 41395篇 |
2003年 | 42103篇 |
2002年 | 37889篇 |
2001年 | 66678篇 |
2000年 | 68871篇 |
1999年 | 57010篇 |
1998年 | 17066篇 |
1997年 | 15418篇 |
1996年 | 16223篇 |
1995年 | 16455篇 |
1994年 | 15336篇 |
1993年 | 14334篇 |
1992年 | 47290篇 |
1991年 | 45974篇 |
1990年 | 44220篇 |
1989年 | 42004篇 |
1988年 | 38914篇 |
1987年 | 38267篇 |
1986年 | 36004篇 |
1985年 | 34784篇 |
1984年 | 26469篇 |
1983年 | 22214篇 |
1982年 | 13968篇 |
1981年 | 12471篇 |
1980年 | 11841篇 |
1979年 | 23659篇 |
1978年 | 17146篇 |
1977年 | 14411篇 |
1976年 | 13257篇 |
1975年 | 13733篇 |
1974年 | 16146篇 |
1973年 | 15418篇 |
1972年 | 14187篇 |
1971年 | 13053篇 |
1970年 | 11928篇 |
1969年 | 11153篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
M. Alexandra Friedman Charlotte M. Niznik Janelle R. Bolden Lynn M. Yee 《Journal of community health》2016,41(2):354-358
While peer support has been investigated in multiple clinical contexts, its application to the postpartum setting is unknown. The aim was to assess acceptability of a postpartum peer support program for women with diabetes. Observational survey-based needs assessment of forty low-income women with diabetes, receiving care at a major medical institution. Mean age and gravidity were 30.7 years and 3.15 ± 1.67 respectively. 45 % expressed interest in a “buddy.” There was no significant difference between groups desiring and not desiring this program. A majority of respondents desired telephone, text messaging, and in-person contacts (79.2, 72.1, 83.8 %), with 72.5 % of patients desiring diabetes-related activities during clinic waiting time. Many women desire a postpartum diabetes reciprocal peer program for support outside of clinician visits. Patients are receptive to educational services during their wait and outside of clinic time, a potentially valuable opportunity to share important health information. 相似文献
122.
123.
124.
Turnbull Chris D. Stockley James A. Madathil Shyam Huq Syed S. A. Cooper Brendan G. Ali Asad Wharton Simon Stradling John R. Heitmar Rebekka 《Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie》2022,260(7):2129-2139
Graefe's Archive for Clinical and Experimental Ophthalmology - Retinal microvascular endothelial dysfunction is thought to be of importance in the development of ocular vascular diseases.... 相似文献
125.
126.
José Antonio Pereira Miguel Pera Manuel López-Cano Marta Pascual Sandra Alonso Silvia Salvans Marta Jiménez-Toscano Alba González-Martín Luis Grande-Posa 《Cirugía espa?ola》2019,97(1):20-26
Objectives
To determine the incidence of incisional hernia (IH) in the extraction incision (EI) in colorectal resection for cancer. To analyze whether the location of the incision has any relationship with the incidence of hernias and whether mesh could be useful for prevention in high-risk patients.Methods
Retrospective review of the colon and rectal surgery database from January 2015 to December 2016. Data were classified into 2 groups, transverse (TI) and midline incision (MI), and the latter was divided into 2 subgroups (mesh [MIM] and suture [MIS]). Patients were classified using the HERNIAscore. Hernias were diagnosed by clinical and/or CT examination.Results
A total of 182 out of 210 surgical patients were included. After a median follow-up of 13.0 months, 39 IH (21.9%) were detected, 23 of which (13.4%) were in the EI; their frequency was lower in the TI group (3.4%) and in the MIM group (5.9%) than in the MIS group (29.5%; p = 0.007). The probability of developing IH in the MIS group showed an OR = 11.7 (95%CI: 3.3-42.0) compared to the TI group and 4.3 (IC 95%: 1.1-16.3) versus the MIM group.Conclusions
The location of the incision is relevant to avoid incisional hernias. Transverse incisions should be used as the first option. When a midline incision is needed, a prophylactic mesh could be considered in high risk patients because it is safe and associated with low morbidity. 相似文献127.
128.
129.
T.F.A. Lees L. Bogdashich D. Godden 《The British journal of oral & maxillofacial surgery》2021,59(1):e9-e12
Fibroepithelial polyps (FEPs) are common, benign intraoral lesions that tend to develop slowly at predictable sites, often in response to local irritation or trauma. Historical precedent often results in referral to oral and maxillofacial surgery (OMFS) departments for biopsy, often irrespective of symptoms, and histological assessment. OMFS and pathology services are struggling to cope with an increasing workload that will potentially lead to widespread delays to diagnosis and treatment. Over the past 20 years, clinical pathways and guidance have been developed to ensure that healthcare interventions, such as the removal of third molars, tonsils, skin tags, and benign moles, are evidence-based, have a net patient benefit, and ensure the best use of finite NHS resources. However, no such guidance exists for intraoral lesions and we regard this as an oversight. We analysed the removal of 682 FEPs over a seven-year period and report sensitivities of 92.4% for a “confirmed clinical suspicion of an FEP” and 99.7% for a “confirmed clinical suspicion of a benign diagnosis”. The incidence of non-benign disease was 0.3%. Primary care dentists should be able to diagnose and monitor FEPs and refer only if symptoms are serious or in high-risk patients or sites. Adopting this practice across the UK could free up to 1825 four-hour OMFS clinics, 405 hours of consultant histopathologists’ time, and recurring savings to the NHS estimated to be in the region of £620 000/annum. We believe that the removal of FEPs should be reclassified as an “intervention not normally funded”, and the time and resources put to better use treating patients with lesions of questionable pathology. 相似文献
130.
Estefany I. Medina-Reyes Carolina Rodríguez-Ibarra Daniel Díaz-Urbina Alejandro Déciga-Alcaraz Normal L. Delgado-Buenrostro Yolanda I. Chirino José Pedraza-Chaverri 《Journal of applied toxicology : JAT》2022,42(8):1411-1419
Food-grade titanium dioxide (E171) is widely used as a food additive, and it is known that after oral consumption, E171 is translocated into the bloodstream reaching the highest titanium level at 6 h. E171 is accumulated in some organs triggering toxicity, but the effects on the blood parameters after oral consumption have been less studied. Recently, evidence shows that oral exposure to E171 induces behavioral signs of anxiety and depression. The relation between blood alterations and psychiatric disorders has been previously demonstrated. However, the oral exposure to E171 effects on alterations in blood parameters and effects linked to alterations in animal behavior has not been explored. In this short communication, we aimed to investigate the effects of E171 on specific blood parameters (hematocrit, hemoglobin, number of erythrocytes, and leukocytes) and anxiety and compulsive-like behavior in males and females orally exposed to ~5 mg/kg for 4 weeks. The results showed that E171 decreased hematocrit and hemoglobin in male but not in female mice while leukocyte and erythrocyte count remained unaltered. Oral consumption of E171 decreased the levels of anxiety-like behavior in females but not in male mice, while compulsive-like behavior was increased in both male and female mice. 相似文献