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   11817篇
  免费   984篇
  国内免费   36篇
耳鼻咽喉   190篇
儿科学   265篇
妇产科学   188篇
基础医学   1617篇
口腔科学   163篇
临床医学   1278篇
内科学   2459篇
皮肤病学   162篇
神经病学   1122篇
特种医学   412篇
外科学   1854篇
综合类   164篇
一般理论   27篇
预防医学   1047篇
眼科学   178篇
药学   823篇
中国医学   7篇
肿瘤学   881篇
  2024年   10篇
  2023年   111篇
  2022年   131篇
  2021年   410篇
  2020年   233篇
  2019年   401篇
  2018年   523篇
  2017年   367篇
  2016年   355篇
  2015年   378篇
  2014年   528篇
  2013年   576篇
  2012年   999篇
  2011年   982篇
  2010年   577篇
  2009年   492篇
  2008年   799篇
  2007年   794篇
  2006年   739篇
  2005年   735篇
  2004年   686篇
  2003年   507篇
  2002年   518篇
  2001年   95篇
  2000年   64篇
  1999年   87篇
  1998年   90篇
  1997年   75篇
  1996年   63篇
  1995年   51篇
  1994年   53篇
  1993年   41篇
  1992年   28篇
  1991年   29篇
  1990年   33篇
  1989年   32篇
  1988年   27篇
  1987年   25篇
  1986年   25篇
  1985年   24篇
  1984年   16篇
  1983年   17篇
  1982年   11篇
  1981年   16篇
  1980年   9篇
  1978年   6篇
  1976年   11篇
  1973年   6篇
  1970年   5篇
  1969年   6篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Cancer Causes & Control - Congenital malformations are strong risk factors for childhood cancer. Our objective was to determine whether cancer survival differs by birth defect status among...  相似文献   
2.
3.
Using data on waterfowl band recoveries, we identified spatially explicit hotspots of concentrated waterfowl movement to predict occurrence and spatial spread of a novel influenza A virus (clade 2.3.4.4) introduced from Asia by waterfowl from an initial outbreak in North America in November 2014. In response to the outbreak, the hotspots of waterfowl movement were used to help guide sampling for clade 2.3.4.4 viruses in waterfowl as an early warning for the US poultry industry during the outbreak . After surveillance sampling of waterfowl, we tested whether there was greater detection of clade 2.3.4.4 viruses inside hotspots. We found that hotspots defined using kernel density estimates of waterfowl band recoveries worked well in predicting areas with higher prevalence of the viruses in waterfowl. This approach exemplifies the value of ecological knowledge in predicting risk to agricultural security.  相似文献   
4.
5.
6.
7.
8.
Approximately 36 400 cardiac and 23 100 thoracic operations are carried out in the United Kingdom between 2006 and 2015. National Health Service (NHS) resolution, as known as the NHS litigation authority, is one of the essential bodies of the Department of Health. Its purpose is to provide NHS expertise to resolve concerns fair and square share learning for improvement. We aim to evaluate and increase awareness of medicolegal cases in cardiothoracic surgery. Total numbers and details of claims coded by NHS resolution in cardiothoracic surgery from 2004 to 2017 were requested under the Freedom of Information Act 2000. The data provided in successful claims is further breakdown into damages paid to the claimant, defence cost, claimant cost paid and the sum of the three. In contrast, unsuccessful claims only include the defence cost. Moreover, data provided also includes further analysis of primary causes and primary injuries for Claims Closed/Settled with damages paid. There were 753 claims recorded from 2004 to 2017, of which 415 (55.11%) were successful. The number of claims has been steadily increasing since 2004, with two significant raises from 2009/10 to 2010/11 (37‐55, 48.64% raise) and 2012/13 to 2013/14 (49‐69, 40.82% raise). The mean successful claim ratio was 69.58% (range, 47.56%‐ 83.33%) There is also a steady increase in the successful ratio from 2004 to 2017. In summary, this is the first study published in relation to litigation claims on cardiothoracic surgery in the United Kingdom. The results have provided insight on claims made against cardiothoracic surgery.  相似文献   
9.
10.
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