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   4492734篇
  免费   395637篇
  国内免费   29586篇
耳鼻咽喉   63174篇
儿科学   137590篇
妇产科学   115962篇
基础医学   682992篇
口腔科学   124125篇
临床医学   419772篇
内科学   811976篇
皮肤病学   108315篇
神经病学   381140篇
特种医学   177884篇
外国民族医学   1010篇
外科学   677544篇
综合类   159800篇
现状与发展   75篇
一般理论   2625篇
预防医学   373478篇
眼科学   106874篇
药学   326099篇
  208篇
中国医学   23527篇
肿瘤学   223787篇
  2021年   66764篇
  2020年   45805篇
  2019年   70255篇
  2018年   83869篇
  2017年   66213篇
  2016年   72341篇
  2015年   88704篇
  2014年   125543篇
  2013年   190120篇
  2012年   135498篇
  2011年   140057篇
  2010年   136876篇
  2009年   136318篇
  2008年   120077篇
  2007年   125975篇
  2006年   134901篇
  2005年   130160篇
  2004年   127101篇
  2003年   117009篇
  2002年   106701篇
  2001年   158242篇
  2000年   154731篇
  1999年   143871篇
  1998年   73734篇
  1997年   70276篇
  1996年   67624篇
  1995年   63312篇
  1994年   57194篇
  1993年   52739篇
  1992年   105080篇
  1991年   100305篇
  1990年   95185篇
  1989年   92664篇
  1988年   86156篇
  1987年   84532篇
  1986年   80087篇
  1985年   78391篇
  1984年   66222篇
  1983年   59071篇
  1982年   48240篇
  1981年   44988篇
  1980年   42258篇
  1979年   57987篇
  1978年   47102篇
  1977年   41629篇
  1976年   38694篇
  1975年   37888篇
  1974年   42477篇
  1973年   40602篇
  1972年   38056篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
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   
63.
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   
64.
65.
66.
67.
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   
68.
69.
70.
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