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   2538019篇
  免费   234865篇
  国内免费   15541篇
耳鼻咽喉   34759篇
儿科学   79118篇
妇产科学   62655篇
基础医学   428574篇
口腔科学   66627篇
临床医学   228850篇
内科学   423722篇
皮肤病学   75323篇
神经病学   224505篇
特种医学   100263篇
外国民族医学   42篇
外科学   401134篇
综合类   92200篇
现状与发展   31篇
一般理论   2000篇
预防医学   217161篇
眼科学   57147篇
药学   172404篇
  74篇
中国医学   10598篇
肿瘤学   111238篇
  2022年   19949篇
  2021年   55759篇
  2020年   35884篇
  2019年   58448篇
  2018年   69672篇
  2017年   53100篇
  2016年   58114篇
  2015年   73840篇
  2014年   108463篇
  2013年   173508篇
  2012年   69796篇
  2011年   65740篇
  2010年   112134篇
  2009年   118453篇
  2008年   52464篇
  2007年   51305篇
  2006年   63722篇
  2005年   59082篇
  2004年   60923篇
  2003年   52417篇
  2002年   42268篇
  2001年   53092篇
  2000年   43969篇
  1999年   54202篇
  1998年   59991篇
  1997年   59321篇
  1996年   56868篇
  1995年   52458篇
  1994年   46609篇
  1993年   43659篇
  1992年   34576篇
  1991年   32195篇
  1990年   29568篇
  1989年   30117篇
  1988年   28202篇
  1987年   27459篇
  1986年   26149篇
  1985年   27643篇
  1984年   30723篇
  1983年   29696篇
  1982年   35593篇
  1981年   34116篇
  1980年   32253篇
  1979年   22971篇
  1978年   24438篇
  1977年   23534篇
  1976年   21284篇
  1975年   18794篇
  1974年   17307篇
  1973年   16551篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
IntroductionHip displacement is common in cerebral palsy (CP) and is related to the severity of neurological and functional impairment. It is a silent, but progressive disease, and can result in significant morbidity and decreased quality of life, if left untreated. The pathophysiology of hip displacement in CP is a combination of hip flexor-adductor muscle spasticity, abductor muscle weakness, and delayed weight-bearing, resulting in proximal femoral deformities and progressive acetabular dysplasia. Due to a lack of symptoms in the early stages of hip displacement, the diagnosis is easily missed. Awareness of this condition and regular surveillance by clinical examination and serial radiographs of the hips are the key to early diagnosis and treatment.Hip surveillance programmesSeveral population-based studies from around the world have demonstrated that universal hip surveillance in children with CP allows early detection of hip displacement and appropriate early intervention, with a resultant decrease in painful dislocations. Global hip surveillance models are based upon the patients’ age, functional level determined by the Gross Motor Function Classification system (GMFCS), gait classification, standardized clinical exam, and radiographic indices such as the migration percentage (MP), as critical indicators of progressive hip displacement.ConclusionDespite 25 years of evidence showing the efficacy of established hip surveillance programmes, there is poor awareness among healthcare professionals in India about the importance of regular hip surveillance in children with CP. There is a need for professional organizations to develop evidence-based guidelines for hip surveillance which are relevant to the Indian context.  相似文献   
53.
PurposeThe purpose of this study was to make a systematic review and meta-analysis to determine the stent diameter (8 mm vs. 10 mm) that conveys better safety and clinical efficacy for transjugular intrahepatic portosystemic shunt (TIPS).Materials and methodsFour databases were used to identify clinical trials published from inception until March 2020. Data were extracted to estimate and compare one-year and three-year overall survivals, hepatic encephalopathy, variceal rebleeding, and shunt dysfunction rates between patients with 8 mm covered stents and those with 10 mm covered stents.ResultsFive eligible studies were selected, which included 489 patients (316 men, 173 women). The 8 mm covered stent group had higher efficacy regarding one-year or three-year overall survival (odds ratio [OR], 2.88; P = 0.003) and (OR, 1.81; P = 0.04) and lower hepatic encephalopathy (OR, 0.69; P = 0.04) compared with 10 mm covered stent group. There were no significant differences in variceal rebleeding rate (OR 0.80; P = 0.67). However, shunt dysfunction was lower in 10 mm covered stent group (OR, 2.26; P = 0.003).ConclusionsOur results suggest that the use of 8 mm covered stents should be preferred to that of 10 mm covered stents for TIPS placement when portal pressure is frequently monitored.  相似文献   
54.
55.
56.
57.
Abstract

Purpose

Financial hardship can be a major cause of distress among persons with cancer, resulting in chronic stress and impacting physical and emotional health. This paper provides an analysis of the lived experience of cancer patients’ financial hardship from diagnosis to post-treatment.  相似文献   
58.
59.
60.
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