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   186323篇
  免费   2020篇
  国内免费   705篇
耳鼻咽喉   1327篇
儿科学   6790篇
妇产科学   3149篇
基础医学   18030篇
口腔科学   1639篇
临床医学   13807篇
内科学   32525篇
皮肤病学   786篇
神经病学   16972篇
特种医学   9288篇
外国民族医学   9篇
外科学   29909篇
综合类   3844篇
一般理论   1篇
预防医学   18627篇
眼科学   3036篇
药学   10539篇
  8篇
中国医学   1187篇
肿瘤学   17575篇
  2024年   27篇
  2023年   200篇
  2022年   467篇
  2021年   573篇
  2020年   436篇
  2019年   453篇
  2018年   22299篇
  2017年   17684篇
  2016年   19841篇
  2015年   1454篇
  2014年   1462篇
  2013年   1388篇
  2012年   7767篇
  2011年   21820篇
  2010年   19324篇
  2009年   11957篇
  2008年   19988篇
  2007年   22209篇
  2006年   1077篇
  2005年   2680篇
  2004年   3686篇
  2003年   4646篇
  2002年   2748篇
  2001年   503篇
  2000年   688篇
  1999年   469篇
  1998年   364篇
  1997年   391篇
  1996年   259篇
  1995年   234篇
  1994年   221篇
  1993年   139篇
  1992年   141篇
  1991年   147篇
  1990年   187篇
  1989年   136篇
  1988年   97篇
  1987年   85篇
  1986年   65篇
  1985年   51篇
  1984年   44篇
  1983年   45篇
  1982年   36篇
  1980年   43篇
  1974年   26篇
  1938年   60篇
  1937年   25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
31.
Introduction Iniencephaly, a neural tube defect involving occiput and inion and combined with rachischisis of the cervical, thoracic spine, and retroflexion position of the head is a very rare congenital abnormality of the fetus–newborn with a 0.1–10 of 10,000 prevalence. This abnormality’s prognosis is thought to be dismal. This abnormality can be associated with other abnormalities such as anencephaly, encephalocele, hydrocephalus, cyclopia, absence of the mandible, cleft lip and palate, cardiovascular disorders, diaphragmatic hernia, renal abnormalities, overgrowth of the arms compared to the legs, and club food and gastrointestinal atresia. Discussion Most of the patients are dead born, and the others die in a few hours. There are only six previously documented long-term survivors. In our case, our patient with iniencephalic signs and findings is still living. She is 2 years old now. We think that this patient presents a mild form of iniencephaly.  相似文献   
32.

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   
33.
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   
34.
With a view to the development of new controlled drug delivery systems, the formation of an interpolyelectrolyte complex (IPEC) between chitosan (CTS) and Eudragit L100 (L-100) has been studied. The structure of this IPEC is such that two maxima are observed in the curves of IPEC swelling in the media with different pH values. The release of a model drug (ibuprofen) from IPEC-based tablets is significantly retarded, and this delay can be controlled by changing the molecular weight of CTS in the IPEC composition. __________ Translated from Khimiko-Farmatsevticheskii Zhurnal, Vol. 39, No. 12, pp. 44–46, December, 2005.  相似文献   
35.
36.
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   
37.
38.

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   
39.
近十年高血压病中医研究概况   总被引:1,自引:0,他引:1  
为了促进中医药治疗高血压病的进一步发展,深入进行高血压病中医的病因病机、治法方药、作用机制的相关研究,本文对近十年有代表性的文献进行归纳分析。  相似文献   
40.

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