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   2573986篇
  免费   200373篇
  国内免费   4360篇
耳鼻咽喉   35834篇
儿科学   79895篇
妇产科学   66807篇
基础医学   357556篇
口腔科学   70226篇
临床医学   228973篇
内科学   506147篇
皮肤病学   49447篇
神经病学   218624篇
特种医学   105017篇
外国民族医学   886篇
外科学   394171篇
综合类   58946篇
现状与发展   1篇
一般理论   979篇
预防医学   209528篇
眼科学   58686篇
药学   188948篇
  4篇
中国医学   5123篇
肿瘤学   142921篇
  2018年   46302篇
  2017年   36156篇
  2016年   40588篇
  2015年   25017篇
  2014年   35418篇
  2013年   53012篇
  2012年   77341篇
  2011年   94410篇
  2010年   61313篇
  2009年   53048篇
  2008年   89752篇
  2007年   97047篇
  2006年   76139篇
  2005年   76166篇
  2004年   74670篇
  2003年   73654篇
  2002年   70744篇
  2001年   113045篇
  2000年   117340篇
  1999年   98766篇
  1998年   28278篇
  1997年   25971篇
  1996年   25710篇
  1995年   24871篇
  1994年   23442篇
  1993年   21768篇
  1992年   79615篇
  1991年   76624篇
  1990年   73810篇
  1989年   71013篇
  1988年   66014篇
  1987年   64961篇
  1986年   61469篇
  1985年   58535篇
  1984年   44324篇
  1983年   37756篇
  1982年   23011篇
  1981年   20388篇
  1980年   19191篇
  1979年   41421篇
  1978年   29079篇
  1977年   24387篇
  1976年   22921篇
  1975年   23997篇
  1974年   29709篇
  1973年   28071篇
  1972年   26242篇
  1971年   24159篇
  1970年   22791篇
  1969年   21137篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
23.
Secondary tricuspid regurgitation (TR) caused by right ventricular enlargement in the setting of left heart disease/pulmonary hypertension has been well described. In contrast, that associated with right atrial enlargement—atrial functional TR (AF‐TR)—remains largely underappreciated. AF‐TR most often occurs in the setting of lone atrial fibrillation, although it is also seen in its absence (idiopathic AF‐TR). Several recent studies have found that the prevalence, hemodynamic significance, and prognosis of AF‐TR are not inconsequential, suggesting increased physician awareness of this novel clinical entity is warranted. This article discusses the pathogenesis, echocardiographic findings, and treatment of this underappreciated cause of secondary TR.  相似文献   
24.
We review the spectrum of cutaneous disorders associated with inflammatory and neoplastic plasmacytic pathology. Because plasma cells are derived from B‐lymphocytes our overview includes discussion of certain lymphoplasmacytic proliferations. It is structured along histopathological lines, addressing conditions characterized by (a) cutaneous plasma cell infiltrates, (b) deposits of plasma cell products or their derivatives in the skin and (c) miscellaneous, poorly understood cutaneous complications of plasmacytic disorders. Lesions arising primarily in the skin and those due to cutaneous involvement by multisystem disorders are addressed. The range includes a spectrum of tumefactive and circulatory manifestations. We highlight key clinical and pathological features of the different conditions and outline recent advances in our understanding of these entities. By emphasizing the dermatopathological characteristics of this spectrum of disorders we hope to hone the diagnostic accuracy of practitioners in the field.  相似文献   
25.
26.
27.
28.
29.
Academic output is just one aspect of a successful career as a plastic surgeon. However, for those with a strong interest in academia, the academic output of a department will likely be a key factor when deciding how to rank jobs. The aim of this study was to quantify and rank the academic output of plastic surgery units across the UK and Ireland. The Institute for Scientific Information (ISI) Web of Science Bibliometric analysis tool was used to collate cumulative (1950–2016), 10 year (2006–2016) and 3 years (2013–2015) research output data for plastic surgery units in the UK and Ireland. Sixty-six plastic surgery units were identified. Departments were ranked for each time period according to the number of papers produced, number of citations (Nc) and h-index (a measure of the impact of scientific output). The top 3 departments for number of papers in the last 10 years were The Royal Free Hospital, London (226) Broomfield Hospital, Chelmsford (218), and Morriston Hospital and Swansea (188). The top 3 for h-number were The Royal Free Hospital (21) Wythenshawe Hospital, Manchester (18) and Morriston Hospital (17). Academic output varies across plastic surgery units in the UK and Ireland. A number of departments have consistently maintained high academic outputs across the years and will be of interest to surgeons hoping to pursue a career in academia.  相似文献   
30.
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