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   3101902篇
  免费   278656篇
  国内免费   13679篇
耳鼻咽喉   43659篇
儿科学   96828篇
妇产科学   82080篇
基础医学   497417篇
口腔科学   86321篇
临床医学   281070篇
内科学   532498篇
皮肤病学   85144篇
神经病学   268888篇
特种医学   125250篇
外国民族医学   229篇
外科学   490761篇
综合类   101331篇
现状与发展   24篇
一般理论   2238篇
预防医学   262246篇
眼科学   71170篇
药学   215974篇
  18篇
中国医学   8781篇
肿瘤学   142310篇
  2021年   49280篇
  2020年   34951篇
  2019年   57894篇
  2018年   70300篇
  2017年   53187篇
  2016年   58783篇
  2015年   73144篇
  2014年   107314篇
  2013年   172578篇
  2012年   85461篇
  2011年   83737篇
  2010年   114125篇
  2009年   119472篇
  2008年   70811篇
  2007年   73476篇
  2006年   84491篇
  2005年   80071篇
  2004年   82532篇
  2003年   73529篇
  2002年   62630篇
  2001年   83419篇
  2000年   75129篇
  1999年   77670篇
  1998年   57398篇
  1997年   55797篇
  1996年   53454篇
  1995年   54312篇
  1994年   48756篇
  1993年   45585篇
  1992年   57001篇
  1991年   54544篇
  1990年   51688篇
  1989年   51222篇
  1988年   47944篇
  1987年   46923篇
  1986年   44724篇
  1985年   45344篇
  1984年   43269篇
  1983年   39831篇
  1982年   39851篇
  1981年   37702篇
  1980年   35601篇
  1979年   36543篇
  1978年   33205篇
  1977年   30422篇
  1976年   27686篇
  1975年   26269篇
  1974年   27469篇
  1973年   26429篇
  1972年   24955篇
排序方式: 共有10000条查询结果,搜索用时 34 毫秒
101.
Techniques in Coloproctology -  相似文献   
102.
103.
Clinical Rheumatology - Central sensitization (CS) is a known contributor to chronic pain in people with knee osteoarthritis (KOA) and is commonly measured by psychophysical testing or...  相似文献   
104.
Journal of Immigrant and Minority Health - COVID-19 has disproportionally affected underrepresented minorities (URM) and low-income immigrants in the United States. The aim of the study is to...  相似文献   
105.
106.
Delirium is one of the most commonly occurring postoperative complications in older adults. It occurs due to the vulnerability of cerebral functioning to pathophysiological stressors. Identification of those at increased risk of developing delirium early in the surgical pathway provides an opportunity for modification of predisposing and precipitating risk factors and effective shared decision-making. No single delirium prediction tool is used widely in surgical settings. Multi-component interventions to prevent delirium involve structured risk factor modification supported by geriatrician input; these are clinically efficacious and cost effective. Barriers to the widespread implementation of such complex interventions exist, resulting in an ‘implementation gap’. There is a lack of evidence for pharmacological prophylaxis for the prevention of delirium. Current evidence suggests that avoidance of peri-operative benzodiazepines, careful titration of anaesthetic depth guided by processed electroencephalogram monitoring and treatment of pain are the most effective strategies to minimise the risk of delirium. Addressing postoperative delirium requires a collaborative, whole pathway approach, beginning with the early identification of those patients who are at risk. The research agenda should continue to examine the potential for pharmacological prophylaxis to prevent delirium while also addressing how successful models of delirium prevention can be translated from one setting to another, underpinned by implementation science methodology.  相似文献   
107.
Brandt  L.  Albert  S.  Brandt  K. L. 《Der Anaesthesist》2022,71(11):858-864
Die Anaesthesiologie - Als Meralgia paraesthetica (MP) bezeichnet man eine zu den neurologischen Engpasssyndromen zählende Schädigung des aus dem Plexus lumbalis entspringenden sensiblen...  相似文献   
108.
The 5-year overall survival rate of a patient with unresectable metastatic colorectal cancer is poor at approximately 14%. Similarly, historical data on liver transplantation (LT) in those with colorectal liver metastases (CRLM) showed poor outcomes, with 5-year survival rates between 12% and 21%. More recently, limited data have shown improved outcomes in select patients with 5-year overall survival rates of approximately 60%. Despite these reported survival improvements, there is no significant improvement in disease-free survival. Given the uncertain benefit with this therapeutic approach and a renewed investigational interest, we aimed to conduct a contemporary systematic review on LT for CRLM. A systematic review of the literature was performed according to the preferred reporting items for systematic reviews and meta-analysis statement. English articles reporting on data regarding LT for CRLM were identified through the MEDLINE (via PubMed), Cochrane Library, and ClinicalTrials.gov databases (last search date: December 16th, 2021) by 2 researchers independently. A total of 58 studies (45 published and 13 ongoing) were included. Although early retrospective studies suggest the possibility that some carefully selected patients may benefit from LT, there is minimal prospective data on the topic and LT remains exploratory in the setting of CRLM. Additionally, several other challenges, such as the limited availability of deceased donor organs and defining appropriate selection criteria, remain when considering the implementation of LT for these patients. Further evidence from ongoing prospective trials is needed to determine if and to what extent there is a role for LT in patients with surgically unresectable CRLM.  相似文献   
109.
Journal of Neuro-Oncology - The role of white blood cells (WBC) in the pediatric central nervous system (CNS) tumor microenvironment is incompletely defined. We hypothesized that the WBC profile in...  相似文献   
110.
Journal of Neuro-Oncology - Craniopharyngiomas are locally-aggressive tumors arising along the hypothalamic-pituitary axis. Treatment is nuanced as a result of their proximity and adherence to...  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