首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   4157812篇
  免费   341168篇
  国内免费   16272篇
耳鼻咽喉   57565篇
儿科学   134592篇
妇产科学   112794篇
基础医学   639683篇
口腔科学   116082篇
临床医学   388235篇
内科学   740760篇
皮肤病学   104039篇
神经病学   350078篇
特种医学   162037篇
外国民族医学   626篇
外科学   624398篇
综合类   123055篇
现状与发展   24篇
一般理论   2610篇
预防医学   357763篇
眼科学   96812篇
药学   291670篇
  26篇
中国医学   11320篇
肿瘤学   201083篇
  2021年   50396篇
  2020年   35666篇
  2019年   58726篇
  2018年   73952篇
  2017年   56206篇
  2016年   61934篇
  2015年   75297篇
  2014年   109785篇
  2013年   175530篇
  2012年   120590篇
  2011年   125675篇
  2010年   125280篇
  2009年   126684篇
  2008年   110996篇
  2007年   117837篇
  2006年   126040篇
  2005年   121213篇
  2004年   121759篇
  2003年   111242篇
  2002年   100159篇
  2001年   143137篇
  2000年   137450篇
  1999年   127513篇
  1998年   63682篇
  1997年   60441篇
  1996年   58422篇
  1995年   59276篇
  1994年   53650篇
  1993年   49816篇
  1992年   94961篇
  1991年   92268篇
  1990年   88282篇
  1989年   85734篇
  1988年   79567篇
  1987年   78040篇
  1986年   74458篇
  1985年   73092篇
  1984年   62284篇
  1983年   55883篇
  1982年   46324篇
  1981年   43302篇
  1980年   40626篇
  1979年   54375篇
  1978年   44945篇
  1977年   39451篇
  1976年   37046篇
  1975年   36472篇
  1974年   40521篇
  1973年   39448篇
  1972年   37125篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
91.

Objective

To examine the experience of interracial anxiety among health professionals and how it may affect the quality of their interactions with patients from racially marginalized populations. We explored the influence of prior interracial exposure—specifically through childhood neighborhoods, college student bodies, and friend groups—on interracial anxiety among medical students and residents. We also examined whether levels of interracial anxiety change from medical school through residency.

Data Source

Web-based longitudinal survey data from the Medical Student Cognitive Habits and Growth Evaluation Study.

Study Design

We used a retrospective longitudinal design with four observations for each trainee. The study population consisted of non-Black US medical trainees surveyed in their 1st and 4th years of medical school and 2nd and 3rd years of residency. Mixed effects longitudinal models were used to assess predictors of interracial anxiety and assess changes in interracial anxiety scores over time.

Principal Findings

In total, 3155 non-Black medical trainees were followed for 7 years. Seventy-eight percent grew up in predominantly White neighborhoods. Living in predominantly White neighborhoods and having less racially diverse friends were associated with higher levels of interracial anxiety among medical trainees. Trainees' interracial anxiety scores did not substantially change over time; interracial anxiety was highest in the 1st year of medical school, lowest in the 4th year, and increased slightly during residency.

Conclusions

Neighborhood and friend group composition had independent effects on interracial anxiety, indicating that premedical racial socialization may affect medical trainees' preparedness to interact effectively with diverse patient populations. Additionally, the lack of substantial change in interracial anxiety throughout medical training suggests the importance of providing curricular tools and structure (e.g., instituting interracial cooperative learning activities) to foster the development of healthy interracial relationships.  相似文献   
92.
93.
94.
Major depressive disorder and other neuropsychiatric disorders are often managed with long-term use of antidepressant medication. Fluoxetine, an SSRI antidepressant, is widely used as a first-line treatment for neuropsychiatric disorders. However, fluoxetine has also been shown to increase the risk of metabolic diseases such as non-alcoholic fatty liver disease. Fluoxetine has been shown to increase hepatic lipid accumulation in vivo and in vitro. In addition, fluoxetine has been shown to alter the production of prostaglandins which have also been implicated in the development of non-alcoholic fatty liver disease. The goal of this study was to assess the effect of fluoxetine exposure on the prostaglandin biosynthetic pathway and lipid accumulation in a hepatic cell line (H4-II-E-C3 cells). Fluoxetine treatment increased mRNA expression of prostaglandin biosynthetic enzymes (Ptgs1, Ptgs2, and Ptgds), PPAR gamma (Pparg), and PPAR gamma downstream targets involved in fatty acid uptake (Cd36, Fatp2, and Fatp5) as well as production of 15-deoxy-Δ12,14PGJ2 a PPAR gamma ligand. The effects of fluoxetine to induce lipid accumulation were attenuated with a PTGS1 specific inhibitor (SC-560), whereas inhibition of PTGS2 had no effect. Moreover, SC-560 attenuated 15-deoxy-Δ12,14PGJ2 production and expression of PPAR gamma downstream target genes. Taken together these results suggest that fluoxetine-induced lipid abnormalities appear to be mediated via PTGS1 and its downstream product 15d-PGJ2 and suggest a novel therapeutic target to prevent some of the adverse effects of fluoxetine treatment.  相似文献   
95.
96.
97.
98.
Biomedical Engineering - We present here an experimental study demonstrating the action of noninvasive high-intensity focused ultrasound (HIFU) on vein walls in the treatment of varicose disease....  相似文献   
99.
Bulletin of Experimental Biology and Medicine - Using the biomicroscopy method, we studied the reaction of arterial and venous vessels of the broad ligament of the uterus in outbred female rats to...  相似文献   
100.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号