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   178650篇
  免费   1083篇
  国内免费   6篇
耳鼻咽喉   1159篇
儿科学   6693篇
妇产科学   3048篇
基础医学   16965篇
口腔科学   1654篇
临床医学   12601篇
内科学   31601篇
皮肤病学   759篇
神经病学   16870篇
特种医学   8979篇
外科学   29195篇
综合类   2329篇
一般理论   2篇
预防医学   18329篇
眼科学   2751篇
药学   9646篇
中国医学   626篇
肿瘤学   16532篇
  2023年   38篇
  2022年   49篇
  2021年   102篇
  2020年   63篇
  2019年   83篇
  2018年   21998篇
  2017年   17420篇
  2016年   19582篇
  2015年   992篇
  2014年   898篇
  2013年   912篇
  2012年   7177篇
  2011年   21210篇
  2010年   18897篇
  2009年   11606篇
  2008年   19633篇
  2007年   21851篇
  2006年   693篇
  2005年   2330篇
  2004年   3505篇
  2003年   4465篇
  2002年   2624篇
  2001年   291篇
  2000年   423篇
  1999年   195篇
  1998年   248篇
  1997年   248篇
  1996年   132篇
  1995年   128篇
  1994年   142篇
  1993年   92篇
  1992年   85篇
  1991年   128篇
  1990年   173篇
  1989年   110篇
  1988年   86篇
  1987年   72篇
  1986年   64篇
  1985年   70篇
  1984年   42篇
  1983年   46篇
  1982年   64篇
  1980年   60篇
  1978年   39篇
  1976年   32篇
  1974年   38篇
  1938年   60篇
  1934年   31篇
  1932年   56篇
  1930年   47篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
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   
12.
13.
14.

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   
15.

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   
16.

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   
17.
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   
18.
19.
20.

Background  

The telomeric region of mouse chromosome 12 has previously shown frequent allelic loss in murine lymphoma. The Bcl11b gene has been identified and suggested as a candidate tumor suppressor gene within this region. In this study, we aimed to elucidate whether Bcl11b is mutated in lymphomas with allelic loss, and whether the mutations we detected conferred any effect on cell proliferation and apoptosis.  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