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   5469624篇
  免费   413749篇
  国内免费   16745篇
耳鼻咽喉   78266篇
儿科学   173071篇
妇产科学   145706篇
基础医学   805851篇
口腔科学   155680篇
临床医学   505011篇
内科学   997775篇
皮肤病学   125889篇
神经病学   456696篇
特种医学   213879篇
外国民族医学   1455篇
外科学   816066篇
综合类   153478篇
现状与发展   24篇
一般理论   3043篇
预防医学   460050篇
眼科学   130922篇
药学   393204篇
  28篇
中国医学   14117篇
肿瘤学   269907篇
  2021年   57275篇
  2019年   59727篇
  2018年   77440篇
  2017年   59449篇
  2016年   66278篇
  2015年   78185篇
  2014年   113027篇
  2013年   178929篇
  2012年   156260篇
  2011年   166559篇
  2010年   135314篇
  2009年   134146篇
  2008年   151842篇
  2007年   163728篇
  2006年   170300篇
  2005年   164423篇
  2004年   164732篇
  2003年   154181篇
  2002年   143667篇
  2001年   219581篇
  2000年   217998篇
  1999年   194080篇
  1998年   79261篇
  1997年   73108篇
  1996年   70930篇
  1995年   66584篇
  1994年   60589篇
  1993年   55948篇
  1992年   145375篇
  1991年   139892篇
  1990年   134600篇
  1989年   130657篇
  1988年   120934篇
  1987年   119014篇
  1986年   112594篇
  1985年   109433篇
  1984年   87385篇
  1983年   76691篇
  1982年   55194篇
  1981年   50947篇
  1980年   47679篇
  1979年   78497篇
  1978年   60146篇
  1977年   52382篇
  1976年   49040篇
  1975年   49978篇
  1974年   57581篇
  1973年   55241篇
  1972年   52008篇
  1971年   47956篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
993.
994.
995.
996.
Bernard–Soulier syndrome (BSS) is a rare autosomal recessively inherited bleeding disorder. Pregnancy in patients with BSS is characterized by ante‐, intra‐, or postpartum haemorrhage, which may be delayed and severe. There is no consensus in the management of BSS in pregnancy and so far only 16 pregnancies in nine patients have been described. We report a further three pregnancies in two women with the syndrome. We also outline our management of pregnant patients with BSS.  相似文献   
997.
Landgraf  R. 《Der Diabetologe》2006,2(1):S5-S8
NAFDM, the National Action Forum for Diabetes Mellitus, is an umbrella organisation for the leading diabetes organisations in Germany. Since its foundation at the end of 2004, NAFDM has brought together the activities of these organisations, which up to now were frequently working independently of each other, under a single ‘roof’. Supported by a central coordination unit, three project groups work successfully on the topics scientific research and healthcare research, patient care and prevention. Activities and results are shared and thus integrated into the network. The working groups are supported by NAFDM’s medical and health-policy steering groups. Apart from a number of successful events, two key publications have meanwhile come out: one on the status of prevention and one analysing the healthcare situation for diabetics in Germany. All people interested in diabetology are invited to join in and work with the NAFDM.  相似文献   
998.
It is often difficult for medical professionals to understand the behaviour of people with diabetic foot syndrome. We describe the different psychological factors that play a role in the maintenance of intermittent implementation of medical recommendations. In particular we look at the consequences of neuropathy and of the recommendation to offload pressure, as well as the contradictions between the realities of the patient and the medical professionals involved in their care. We show that the solutions that patients develop are based on normal psychological processes and we encourage professionals to consider these aspects in their relationship to people with DFS and when developing individualised preventative measures.  相似文献   
999.
1000.
Multi-day signals, generally with duration of 2-10 days, are a prominent temporal variation type of radon (Rn) in geogas in the unsaturated zone. Rare multi-day Rn signals have been found which are characterized by: (a) a declining limb lasting up to 10 days which conforms to the radioactive decay of Rn, (b) recurs at the same location and (c) is recorded in diverse situations-volcanic and seismogenic. It suggested that a Rn blob is injected at a lower level on a steady upward flow of geogas whereby the rise and final fall of the signal are attributed to the edges of the blob while the central Rn-decay segment records the passing of the decaying blob itself. Rn-decay signals are a small subset of multi-day Rn signals which are considered as highly irregular and unusable for the understanding of geophysical processes. In difference, it is concluded that multi-day Rn signals are probably proxies of subtle geodynamic processes at upper crustal levels and are therefore significant for studying such processes.  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