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   4198011篇
  免费   314186篇
  国内免费   10480篇
耳鼻咽喉   59080篇
儿科学   133930篇
妇产科学   114086篇
基础医学   587582篇
口腔科学   120436篇
临床医学   386962篇
内科学   816445篇
皮肤病学   94741篇
神经病学   350134篇
特种医学   161941篇
外国民族医学   1485篇
外科学   626556篇
综合类   91733篇
现状与发展   6篇
一般理论   1761篇
预防医学   338034篇
眼科学   97203篇
药学   310684篇
  11篇
中国医学   8383篇
肿瘤学   221484篇
  2019年   33580篇
  2018年   48430篇
  2017年   36704篇
  2016年   41266篇
  2015年   46537篇
  2014年   64258篇
  2013年   97708篇
  2012年   132812篇
  2011年   140464篇
  2010年   82899篇
  2009年   78175篇
  2008年   130787篇
  2007年   138990篇
  2006年   139952篇
  2005年   135457篇
  2004年   130188篇
  2003年   125199篇
  2002年   121482篇
  2001年   188443篇
  2000年   193974篇
  1999年   164588篇
  1998年   48841篇
  1997年   43593篇
  1996年   43190篇
  1995年   41869篇
  1994年   38881篇
  1993年   36373篇
  1992年   130614篇
  1991年   126327篇
  1990年   122072篇
  1989年   117956篇
  1988年   109069篇
  1987年   107389篇
  1986年   101395篇
  1985年   97148篇
  1984年   73147篇
  1983年   62449篇
  1982年   37645篇
  1981年   33848篇
  1979年   67202篇
  1978年   47548篇
  1977年   40339篇
  1976年   37723篇
  1975年   39897篇
  1974年   48368篇
  1973年   46208篇
  1972年   43482篇
  1971年   40258篇
  1970年   37644篇
  1969年   35612篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
Introduction: In men, lower urinary tract symptoms (LUTS) are primarily attributed to benign prostatic hyperplasia (BPH). Therapeutic options are targeted to relax prostate smooth muscle and/or reduce prostate enlargement.

Areas covered: This article reviews the major preclinical and clinical data on PDE5 inhibitors with a specific focus on tadalafil. It includes details of the role of the nitric oxide (NO)-cyclic guanosine monophosphate (cGMP) – PDE5 pathway in the LUT organs (bladder and prostate) in addition to the available data on tadalafil in patients with LUTS secondary to BPH with or without erectile dysfunction (ED).

Expert opinion: Preclinical and clinical data have clearly demonstrated that PDE5 inhibitors induce bladder and prostate relaxation, which contributes to the improvement seen in storage symptoms in both animal models of bladder and prostate hypercontractility. Tadalafil is effective both as a monotherapy and add-on therapy in patients with LUTS secondary to BPH. Furthermore, as LUTS-BPH and ED are urological disorders that commonly coexist in aging men, tadalafil is more advantageous than α1-adrenoceptors and should be used as the first option. Tadalafil is a safe and tolerable therapy and unlike α1- adrenoceptors and 5-alpha reductase inhibitors, which can cause sexual dysfunctions, tadalafil improves sexual function.  相似文献   

63.
64.
65.
66.
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   
67.
68.
69.
70.
Introduction: The treatment of classical Hodgkin lymphoma (cHL) in children is a story of success. Nowadays, more than 90% of patients are cured and overall survival is nearly 100% at 5 years. Efforts have been made to avoid related effects of therapies; therefore, children are treated using different chemotherapy schemes in comparison with adults.

Areas covered: This review includes a view of the clinical classification and risk assessment in children suffering from HL. The chemotherapy more commonly employed is revisited. The use of PET/CT to evaluate the disease in order to guide therapy is analyzed. New options of chemotherapy and emerging immunotherapy are also included.

Expert opinion: In order to make the right treatment choice, a proper initial assessment of risk is mandatory. The choice of therapy in these kinds of patients must be done according to the experience of the team, and also, the cost and logistics related to the eligible scheme are very important. If possible, efforts must be made to include PET/CT in guiding therapy and avoiding overtreatment and long-term adverse effects in children. New options in immunotherapy are emerging and must be considered with caution in selected patients.  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