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   189999篇
  免费   1673篇
  国内免费   154篇
耳鼻咽喉   1285篇
儿科学   7012篇
妇产科学   3127篇
基础医学   18277篇
口腔科学   1924篇
临床医学   13202篇
内科学   34907篇
皮肤病学   944篇
神经病学   17351篇
特种医学   9546篇
外科学   31207篇
综合类   2359篇
预防医学   18366篇
眼科学   2897篇
药学   10356篇
中国医学   654篇
肿瘤学   18412篇
  2023年   136篇
  2022年   251篇
  2021年   498篇
  2020年   275篇
  2019年   329篇
  2018年   22262篇
  2017年   17610篇
  2016年   19823篇
  2015年   1291篇
  2014年   1270篇
  2013年   1407篇
  2012年   7854篇
  2011年   21984篇
  2010年   19354篇
  2009年   11957篇
  2008年   20330篇
  2007年   22646篇
  2006年   1484篇
  2005年   3142篇
  2004年   4346篇
  2003年   5213篇
  2002年   3409篇
  2001年   431篇
  2000年   549篇
  1999年   343篇
  1998年   452篇
  1997年   387篇
  1996年   265篇
  1995年   264篇
  1994年   260篇
  1993年   219篇
  1992年   125篇
  1991年   179篇
  1990年   198篇
  1989年   148篇
  1988年   102篇
  1987年   85篇
  1986年   55篇
  1985年   62篇
  1984年   50篇
  1983年   48篇
  1982年   67篇
  1981年   30篇
  1980年   68篇
  1978年   30篇
  1974年   35篇
  1938年   60篇
  1934年   30篇
  1932年   56篇
  1930年   46篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
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   
12.
13.
For persons battling HIV/AIDS a stable place to live may decide the length and quality of life itself. It is nearly impossible for a person on the streets to engage in a needed continuous AIDS treatment regimen when the very basic question of where that person will rest his or her head when darkness comes in just a few hours is unresolved. When danger lurks on the streets, when cold numbs the limbs, when tiredness overwhelms the mind, when fear breaks the spirit, a place to call home would make all the difference.  相似文献   
14.
15.
16.

Background  

Health service policy in the United Kingdom emphasises the importance of self-care by patients with chronic conditions. Written information for patients about their condition is seen as an important aid to help patients look after themselves. From a discourse analysis perspective written texts such as patient information leaflets do not simply describe the reality of a medical condition and its management but by drawing on some sorts of knowledge and evidence rather than others help construct the reality of that condition. This study explored patient information leaflets on osteoarthritis (OA) to see how OA was constructed and to consider the implications for self-care.  相似文献   
17.

Background  

Total hip arthroplasty is a successful surgery, that fails at a rate of approximately 10% at ten years from surgery. Causes for failure are mainly aseptic loosening of one or both components partially due to wear of articular surfaces and partially to design. The present analysis aimed to identify risk factors and quantify their effects on aseptic failure.  相似文献   
18.

Background  

Skin and soft tissue infections are increasingly prevalent clinical problems, and it is important for health care practitioners to be well trained in how to treat skin abscesses. A realistic model of abscess incision and drainage will allow trainees to learn and practice this basic physician procedure.  相似文献   
19.
Abstract Background: Primary shoulder hemiarthroplasty is an established treatment modality for complex fractures of the proximal humerus. Long-term functional outcome is often disappointing. However, little is known about social implications particularly in the elderly. Methods: A single-institution case series of consecutive geriatric patients (age > 70 years) treated with shoulder hemiarthroplasty for complex fractures of the proximal humerus between 1994 and 1997 was analysed. Postoperative morbidity, long-term function, radiological outcome and social implications were evaluated. Results: Seventy-seven patients fulfilled the study criteria. Median age at the time of operation was 80 years (range 70–93 years). Systemic and local postoperative complications were observed in 8% including 2 patients (3%) with revision surgery. Postoperative mortality was 1%. Forty-eight patients (62%) were available for follow-up (median 49 months, range 25–80 months), 22 (29%) died from causes unrelated to hemiarthroplasty before follow-up and 7 patients (9%) did not attend follow-up examination. Median Constant-Murley score was 41 points (range 17–77 points). Long-term results concerning pain were satisfying. The Oxford shoulder score ranged from 14 to 40 (median 30). Forty-one patients (85%) still lived in their original environment and managed their daily life independently despite poor shoulder function. Four patients (8%) lived in a retirement home and 3 (6%) in a nursery home. Eighty percent of our patients were still able to use public transportation, do the daily shopping and wash their whole body by themselves. Conclusion: Most patients managed their daily life independently despite poor shoulder function.  相似文献   
20.
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