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   180667篇
  免费   1201篇
  国内免费   74篇
耳鼻咽喉   1225篇
儿科学   6720篇
妇产科学   3238篇
基础医学   16839篇
口腔科学   1653篇
临床医学   12811篇
内科学   32328篇
皮肤病学   736篇
神经病学   16679篇
特种医学   9130篇
外科学   29906篇
综合类   2329篇
预防医学   18304篇
眼科学   2863篇
药学   9662篇
中国医学   626篇
肿瘤学   16893篇
  2023年   47篇
  2022年   133篇
  2021年   240篇
  2020年   132篇
  2019年   205篇
  2018年   22081篇
  2017年   17481篇
  2016年   19627篇
  2015年   1039篇
  2014年   1057篇
  2013年   1045篇
  2012年   7439篇
  2011年   21461篇
  2010年   19076篇
  2009年   11754篇
  2008年   19912篇
  2007年   22133篇
  2006年   928篇
  2005年   2479篇
  2004年   3635篇
  2003年   4566篇
  2002年   2670篇
  2001年   287篇
  2000年   407篇
  1999年   180篇
  1998年   242篇
  1997年   221篇
  1996年   113篇
  1995年   118篇
  1994年   110篇
  1993年   66篇
  1992年   45篇
  1991年   86篇
  1990年   133篇
  1989年   76篇
  1988年   55篇
  1987年   41篇
  1986年   25篇
  1985年   29篇
  1983年   23篇
  1982年   35篇
  1980年   41篇
  1974年   23篇
  1969年   21篇
  1938年   60篇
  1937年   25篇
  1935年   22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 12 毫秒
21.
22.
23.
24.
Introduction Choroid plexus cysts can lead to isolation of the lateral ventricles and distension of the third ventricle. We present an ultrasonographic video documentation of an infant with variably shaped and localized choroid plexus cyst of the third ventricle. Case report An infant had periods of increased intracranial pressure with changing dilatation of the first to third ventricle. Cerebral ultrasonography of the not crying boy demonstrated a choroid plexus cyst limply hanging down from the roof of the third ventricle to the beginning of the aqueduct of Sylvius. During crying, the cyst prolapsed from the third into left lateral ventricle and was strangled by the foramen of Monro. Endoscopic cyst fenestration and third ventriculostomy continuously solved the problem of intermittent hydrocephalus occlusus. Conclusion Depending not only on localization and size but also on cyst form and cerebrospinal fluid pressure, a single choroid plexus cyst can cause various obstructions of cerebrospinal fluid pathways.  相似文献   
25.

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   
26.
Isolated pure dislocations of the fifth carpo-metacarpal joint are extremely rare injuries. The dorsal form was described in mere 12 cases. The diagnosis can be easily missed. The lesion is also often overlooked in the routine diagnostic X-ray. Lateral and oblique views are important for the recognition of the true extent of the lesion. Treatment of these injures is still controversial and both closed reduction with percutaneous pinning or open reduction with internal fixation are advocated. The goal of treatment is early reduction and fixation of the metacarpal. Early diagnosis is the key to success. The aim of this paper is to review literature and present two new cases.  相似文献   
27.
Healthcare information systems (HISs) are often implemented to enhance the quality of care and the degree to which it is patient-centered, as well as to improve the efficiency and safety of services. However, the outcomes of HIS implementations have not met expectations. We set out to organize the knowledge gained in qualitative studies performed in association with HIS implementations and to use this knowledge to outline an updated structure for implementation planning. A multi-disciplinary team performed the analyses in order to cover as many aspects of the primary studies as possible. We found that merely implementing an HIS will not automatically increase organizational efficiency. Strategic, tactical, and operational actions have to be taken into consideration, including management involvement, integration in healthcare workflow, establishing compatibility between software and hardware and, most importantly, user involvement, education and training. The results should be interpreted as a high-order scheme, and not a predictive theory.  相似文献   
28.
29.

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   
30.

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   
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