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   11966篇
  免费   1172篇
  国内免费   62篇
耳鼻咽喉   100篇
儿科学   498篇
妇产科学   328篇
基础医学   1706篇
口腔科学   386篇
临床医学   1318篇
内科学   2413篇
皮肤病学   188篇
神经病学   987篇
特种医学   441篇
外科学   1517篇
综合类   312篇
一般理论   19篇
预防医学   1325篇
眼科学   114篇
药学   940篇
中国医学   26篇
肿瘤学   582篇
  2021年   202篇
  2020年   88篇
  2019年   172篇
  2018年   250篇
  2017年   147篇
  2016年   197篇
  2015年   217篇
  2014年   268篇
  2013年   389篇
  2012年   620篇
  2011年   579篇
  2010年   343篇
  2009年   345篇
  2008年   550篇
  2007年   592篇
  2006年   524篇
  2005年   496篇
  2004年   462篇
  2003年   423篇
  2002年   417篇
  2001年   404篇
  2000年   402篇
  1999年   358篇
  1998年   144篇
  1997年   143篇
  1996年   108篇
  1995年   94篇
  1994年   112篇
  1993年   107篇
  1992年   291篇
  1991年   280篇
  1990年   263篇
  1989年   252篇
  1988年   240篇
  1987年   238篇
  1986年   232篇
  1985年   195篇
  1984年   151篇
  1983年   158篇
  1982年   91篇
  1981年   77篇
  1980年   82篇
  1979年   167篇
  1978年   123篇
  1977年   105篇
  1976年   80篇
  1975年   90篇
  1974年   103篇
  1973年   89篇
  1972年   77篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
A toxicologic-pathologic study of isobutyl-2-cyanoacrylate (Bucrylate) was carried out first in dogs and then in humans whose arteriovenous malformations were infused with this embolic agent. The canine specimens obtained at 7, 18, 28, and 147 days after embolization showed the development of a mild histiocytic giant cell reaction, which evolved to end-state sclerotic arteritis. The response was confined to the vessels and did not involve contiguous parenchymal tissues. Ten human specimens, obtained from 1 hr to 7 years after treatment, showed a similar bland reaction with no evidence of suppuration or premalignant changes.  相似文献   
22.
Reproductive and social histories of the first 100 patients attending the in vitro fertilisation (IVF) programme at National Women's Hospital, Auckland, have been studied. The average age at first treatment was 31.6 (SD 3.9) for women, and 34.2 (4.6) for men. The couples had been married 7.6 (3.3) years and had experienced 6.7 (3.2) years infertility. It was a second marriage for 16. The husbands had on average a higher social classing than the population (class: number [population]--1:16 (7%), 2:18 (14%), 3:42 (28%), 4:19 (29%), 5:4 (14%), 6:1 (8%); but this bias diminished in the next 159 couples. Nine couples withdrew before their quota of cycles, 7 from stress. Tubal disease was the cause of infertility in 93, but in 69 its origin was untraceable. In 22 it could be attributed to pelvic inflammatory disease (eight associated with IUCDs and 2 with sexually transmitted disease) and in two to sterilisation. Although 59 women had a history of having conceived, only 34 were parous, and only 11 had a child of the current union.  相似文献   
23.
Submersion injuries are a major cause of morbidity and mortality in children and young adults. The Emergency Department physician should be familiar with the epidemiology, pathophysiology, modes of therapy, and prognostic indicators in order to provide optimum resuscitation to the near-drowning victim, correct referral, and counseling to their families.  相似文献   
24.
25.
26.
27.
28.
Tuberculosis in the UK, 1994: current issues and future trends.   总被引:1,自引:0,他引:1       下载免费PDF全文
L P Ormerod  R J Shaw    D M Mitchell 《Thorax》1994,49(11):1085-1089
  相似文献   
29.
30.
Acute septic arthritis in infancy and childhood   总被引:4,自引:0,他引:4  
Despite intensive study of acute septic arthritis in infancy and childhood, poor outcomes continue to occur. Failures are often due to delayed diagnosis and inadequate therapy, but can be due to factors beyond physicians' control such as associated osteomyelitis and occurrence during infancy. Recent advances in the understanding and management of septic arthritis include: (1) demonstration of beneficial effects of continuous passive motion in rabbits; (2) identification of inflammatory mediators of cartilage destruction and their respective sources; (3) recognition of changing patterns of pathologic organisms; (4) evolution of new antibiotics and standards for oral and home intravenous therapy; (5) development of arthroscopic debridement of septic knees; and (6) further refinement of indications for aspiration-irrigation versus open surgical drainage of septic joints. Permanent sequelae from septic arthritis can only be prevented by early diagnosis and aggressive treatment.  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