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   228379篇
  免费   4357篇
  国内免费   110篇
耳鼻咽喉   1648篇
儿科学   8849篇
妇产科学   4485篇
基础医学   23180篇
口腔科学   2063篇
临床医学   20719篇
内科学   39736篇
皮肤病学   1404篇
神经病学   21460篇
特种医学   9823篇
外科学   33110篇
综合类   2891篇
一般理论   109篇
预防医学   25504篇
眼科学   3472篇
药学   12946篇
中国医学   684篇
肿瘤学   20763篇
  2023年   290篇
  2022年   432篇
  2021年   1017篇
  2020年   695篇
  2019年   1059篇
  2018年   22946篇
  2017年   18179篇
  2016年   20416篇
  2015年   2105篇
  2014年   2459篇
  2013年   3434篇
  2012年   10759篇
  2011年   24988篇
  2010年   20940篇
  2009年   13510篇
  2008年   23071篇
  2007年   25500篇
  2006年   4369篇
  2005年   6119篇
  2004年   7123篇
  2003年   7867篇
  2002年   5743篇
  2001年   719篇
  2000年   732篇
  1999年   616篇
  1998年   874篇
  1997年   801篇
  1996年   562篇
  1995年   575篇
  1994年   516篇
  1993年   393篇
  1992年   277篇
  1991年   288篇
  1990年   306篇
  1989年   269篇
  1988年   235篇
  1987年   206篇
  1986年   183篇
  1985年   191篇
  1984年   204篇
  1983年   188篇
  1982年   239篇
  1981年   207篇
  1980年   194篇
  1979年   96篇
  1978年   122篇
  1976年   65篇
  1974年   87篇
  1938年   60篇
  1932年   56篇
排序方式: 共有10000条查询结果,搜索用时 10 毫秒
31.
32.
This paper reports the proceedings of the discussion panel assigned to look at clinical aspects of quality in emergency medicine. One of the seven stated objectives of the Academic Emergency Medicine consensus conference on quality in emergency medicine was to educate emergency physicians regarding quality measures and quality improvement as essential aspects of the practice of emergency medicine. Another topic of interest was a discussion of the value of information technology in facilitating quality care in the clinical practice of emergency medicine. It is important to note that this is not intended to be a comprehensive review of this extensive topic, but instead is designed to report the discussion that occurred at this session of the consensus conference.  相似文献   
33.
34.
35.
The treatment of deep cartilage defects in load-bearing joints is a problem that still has no satisfactory solution. Full-thickness defects of the articular cartilage rarely heal spontaneously, usually leaving damage that can lead to early arthrosis. Techniques currently available for the treatment of chondral defects include abrasion, drilling, micro-fracturing, transplantation of tissue autografts and allografts, and cell transplantation. Osteochondral autograft transplantation is currently the only surgical cartilage repair technique known to lead to the formation of genuine hyaline articular cartilage and its retention at least in the medium term. The Draenert method, in which a water-cooled diamond bone-cutting system is used, is an effective procedure for resurfacing the joints affected by localised cartilaginous defects, even when there is also severe bone loss. Donor-side morbidity can be kept to a minimum by filling the defect caused by harvesting with a press-fit cylinder of cancellous bone covered with periosteum for protection.  相似文献   
36.
Contemporary discourse contains numerous examples of use of the concept of culture by social and behavioral scientists. Simple reification, where the speaker makes culture into a thing capable of action exemplifies one usage in public discourse. Some quantitative social scientists attempt to characterize people’s cultural identities by means of a single categorical variable, which often “lumps” people into categories such as “Hispanic” or “Black” that in fact have numerous culturally bounded subcategories. Approaches that emphasize cultural process are preferable to those who attempt to categorize; more complex measures of acculturation help investigators to make convincing analyses of circumstances in which health disparities occur. Examples in which investigators make appropriate use of cultural characterizations demonstrate their utility in investigating health disparities in Haitian American women, injecting and noninjecting drug users, Hispanic youth, and adult Hispanics at risk of HIV infection. Focus on culture in the study of health disparities can identify entanglements between structural factors such as poverty and lack of education and cultural factors such as beliefs about health. Qualitative methods coupled with quantitative methods have great potential to improve investigators’ grasp of cultural nuance while capturing the distribution of qualitatively derived behaviors.  相似文献   
37.
38.
39.
40.
The specific characteristics of genetic data lead to ethical-legal conflicts in the framework of genetic diagnosis. Several international organisations, including UNESCO and the Council of Europe, have enacted rules referring to the use of genetic information. This paper discusses possible legal and ethical criteria that could be used in genetic testing.  相似文献   
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