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   3586327篇
  免费   290418篇
  国内免费   16130篇
耳鼻咽喉   48374篇
儿科学   113929篇
妇产科学   92787篇
基础医学   567265篇
口腔科学   95868篇
临床医学   331132篇
内科学   632309篇
皮肤病学   92082篇
神经病学   308348篇
特种医学   137735篇
外国民族医学   404篇
外科学   540152篇
综合类   107856篇
现状与发展   23篇
一般理论   2418篇
预防医学   311880篇
眼科学   81393篇
药学   246474篇
  27篇
中国医学   10626篇
肿瘤学   171793篇
  2021年   56020篇
  2020年   35670篇
  2019年   58887篇
  2018年   72928篇
  2017年   55605篇
  2016年   61243篇
  2015年   75208篇
  2014年   109779篇
  2013年   175767篇
  2012年   105276篇
  2011年   107324篇
  2010年   121119篇
  2009年   124044篇
  2008年   92797篇
  2007年   97026篇
  2006年   106981篇
  2005年   102233篇
  2004年   103012篇
  2003年   93277篇
  2002年   82643篇
  2001年   108463篇
  2000年   101854篇
  1999年   100397篇
  1998年   66197篇
  1997年   63871篇
  1996年   61549篇
  1995年   57087篇
  1994年   51255篇
  1993年   47805篇
  1992年   71443篇
  1991年   68567篇
  1990年   65068篇
  1989年   63415篇
  1988年   58883篇
  1987年   57539篇
  1986年   54949篇
  1985年   54767篇
  1984年   49653篇
  1983年   45234篇
  1982年   42253篇
  1981年   39801篇
  1980年   37408篇
  1979年   41161篇
  1978年   36177篇
  1977年   32663篇
  1976年   30493篇
  1975年   28774篇
  1974年   30294篇
  1973年   29128篇
  1972年   27260篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
131.
132.
133.
134.
135.
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   
136.
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   
137.
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   
138.
139.
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   
140.
Conclusion  Several quality-control measures take place before (patient and camera preparation) and during SPECT acquisition to achieve high-quality images. Not uncommonly, technologists and physicians are left with suboptimal images that have to be addressed to reach the “right answer” for patient diagnosis and hence management. In many cases patients may be reimaged, especially if the problem is detected early, but in other cases either the patient has left the nuclear laboratory or there is an inevitable problem that, even with reimaging, will not be resolved. In these situations the technologist and physician have to seek the available techniques to obtain the best images possible. These resources are discussed in this issue as an aid in quality control to obtain the best possible images.  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