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   1355184篇
  免费   116172篇
  国内免费   6382篇
耳鼻咽喉   16942篇
儿科学   43707篇
妇产科学   36907篇
基础医学   187073篇
口腔科学   36557篇
临床医学   122324篇
内科学   282124篇
皮肤病学   32125篇
神经病学   112272篇
特种医学   56334篇
外国民族医学   280篇
外科学   212288篇
综合类   31586篇
现状与发展   2篇
一般理论   422篇
预防医学   108679篇
眼科学   28437篇
药学   95101篇
  5篇
中国医学   2241篇
肿瘤学   72332篇
  2018年   13787篇
  2017年   10956篇
  2016年   13141篇
  2015年   14756篇
  2014年   20510篇
  2013年   30518篇
  2012年   37416篇
  2011年   40090篇
  2010年   24941篇
  2009年   24540篇
  2008年   37349篇
  2007年   39846篇
  2006年   40934篇
  2005年   39478篇
  2004年   37566篇
  2003年   36650篇
  2002年   34519篇
  2001年   66589篇
  2000年   68496篇
  1999年   57100篇
  1998年   16973篇
  1997年   15236篇
  1996年   16225篇
  1995年   16432篇
  1994年   15265篇
  1993年   14304篇
  1992年   47454篇
  1991年   46078篇
  1990年   44306篇
  1989年   42133篇
  1988年   39038篇
  1987年   38328篇
  1986年   36081篇
  1985年   34849篇
  1984年   26501篇
  1983年   22220篇
  1982年   13914篇
  1981年   12524篇
  1980年   11767篇
  1979年   23628篇
  1978年   17127篇
  1977年   14438篇
  1976年   13228篇
  1975年   13767篇
  1974年   16161篇
  1973年   15440篇
  1972年   14216篇
  1971年   13076篇
  1970年   11927篇
  1969年   11135篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
Obesity Surgery - Laparoscopic sleeve gastrectomy (LSG) is increasingly playing a key role in obesity management. Such operations, however, carry complications sometimes including leaks. The...  相似文献   
52.
Lasers in Medical Science - Studies reported the harmful effects of 2,4-D on body tissues, provoking changes in the anatomy and physiology of the kidneys, liver, and testicles. Thus, the objective...  相似文献   
53.
54.
Behçet disease is a complex, multisystem disease characterized by recurrent oral and genital ulcerations. It rarely occurs in infants or children. Neonatal Behçet disease has been reported in infants whose ulcers resolve at or before 9 weeks of age. Few cases of neonatal Behçet disease persisting into childhood have previously been reported. We report the case of a 1‐month‐old infant who presented with severe recurrent genital ulcerations and at 6 months developed recurrent oral ulcerations. Her orogenital ulcerations continue to recur. Human leukocyte antigen testing revealed HLA‐B51 and B44 positivity. This is a case of pediatric Behçet disease in the neonatal period. Behçet disease should be considered in the differential diagnosis of recurrent genital and oral ulcerations in infants and children.  相似文献   
55.
56.
57.
58.
59.
Preimplantation genetic diagnosis (PGD) was originally developed to diagnose embryo-related genetic abnormalities for couples who present a high risk of a specific inherited disorder. Because this technology involves embryo selection, the medical, bioethical, and legal implications of the technique have been debated, particularly when it is used to select features that are not related to serious diseases. Although several initiatives have attempted to achieve regulatory harmonization, the diversity of healthcare services available and the presence of cultural differences have hampered attempts to achieve this goal. Thus, in different countries, the provision of PGD and regulatory frameworks reflect the perceptions of scientific groups, legislators, and society regarding this technology. In Brazil, several texts have been analyzed by the National Congress to regulate the use of assisted reproduction technologies. Legislative debates, however, are not conclusive, and limited information has been published on how PGD is specifically regulated. The country requires the development of new regulatory standards to ensure adequate access to this technology and to guarantee its safe practice. This study examined official documents published on PGD regulation in Brazil and demonstrated how little direct oversight of PGD currently exists. It provides relevant information to encourage reflection on a particular regulation model in a Brazilian context, and should serve as part of the basis to enable further reform of the clinical practice of PGD in the country.  相似文献   
60.
A 42‐year‐old man presented with a viral prodrome and tested positive for influenza A. He rapidly deteriorated developing cardiogenic shock, rhabdomyolysis, and acute kidney injury. Patient improved 1 week later with supportive measures including vasopressors, inotropes, and an intraaortic balloon pump. We report this case as it highlights the discordance between echocardiographic ventricular wall thickening as a result of myocardial edema, and electrocardiographic findings at presentation, with a reversal in findings at time of resolution. Additionally, there was some suggestion of a regional pattern to the reduced longitudinal strain.  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