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   2444874篇
  免费   175931篇
  国内免费   4805篇
耳鼻咽喉   33010篇
儿科学   80083篇
妇产科学   67000篇
基础医学   348815篇
口腔科学   70920篇
临床医学   221212篇
内科学   469649篇
皮肤病学   55754篇
神经病学   189589篇
特种医学   93424篇
外国民族医学   437篇
外科学   369623篇
综合类   53896篇
现状与发展   5篇
一般理论   757篇
预防医学   179924篇
眼科学   57972篇
药学   185004篇
  13篇
中国医学   6182篇
肿瘤学   142341篇
  2021年   18362篇
  2019年   19007篇
  2018年   27565篇
  2017年   21170篇
  2016年   23541篇
  2015年   26635篇
  2014年   36749篇
  2013年   53810篇
  2012年   74192篇
  2011年   78182篇
  2010年   46364篇
  2009年   43314篇
  2008年   72415篇
  2007年   77290篇
  2006年   77936篇
  2005年   74493篇
  2004年   71640篇
  2003年   68445篇
  2002年   65906篇
  2001年   127881篇
  2000年   130894篇
  1999年   108554篇
  1998年   28398篇
  1997年   24845篇
  1996年   24928篇
  1995年   23821篇
  1994年   21744篇
  1993年   20320篇
  1992年   81984篇
  1991年   79075篇
  1990年   76852篇
  1989年   73762篇
  1988年   67052篇
  1987年   65331篇
  1986年   61748篇
  1985年   58523篇
  1984年   42856篇
  1983年   36477篇
  1982年   20482篇
  1979年   38162篇
  1978年   26239篇
  1977年   22829篇
  1976年   20709篇
  1975年   22520篇
  1974年   26906篇
  1973年   25929篇
  1972年   24217篇
  1971年   22606篇
  1970年   20904篇
  1969年   19769篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
Behçet disease is a complex, multisystem disease characterized by recurrent oral and genital ulcerations. It rarely occurs in infants or children. Neonatal Behçet disease has been reported in infants whose ulcers resolve at or before 9 weeks of age. Few cases of neonatal Behçet disease persisting into childhood have previously been reported. We report the case of a 1‐month‐old infant who presented with severe recurrent genital ulcerations and at 6 months developed recurrent oral ulcerations. Her orogenital ulcerations continue to recur. Human leukocyte antigen testing revealed HLA‐B51 and B44 positivity. This is a case of pediatric Behçet disease in the neonatal period. Behçet disease should be considered in the differential diagnosis of recurrent genital and oral ulcerations in infants and children.  相似文献   
72.
73.
Nevo  N.  Goldstein  A. L.  Staierman  M.  Eran  N.  Carmeli  I.  Rayman  S.  mnouskin  Y. 《Hernia》2022,26(6):1491-1499
Hernia - The minimally invasive surgical repair of combined inguinal and ventral hernias often requires shifting from one approach or plane to another. The traditional enhanced-view totally...  相似文献   
74.
75.
BackgroundSecond-hand smoking or environmental tobacco smoke is a critical health risk. Children are the most vulnerable to second-hand smoking because of their small bronchial ducts, less developed immunity, and low-physical activity.ObjectivesThe purpose of this study was to ascertain the effects of second-hand smoking on lung functions in athlete and non-athlete school-aged children.MethodsThis observational study included forty-six school-aged children, their age was 8–15 years, assigned to three groups; 2 study groups and 1 control group (n=15). The study groups comprised of 16 football players, and of 15 cyclists. Lung functions were evaluated recording forced vital capacity, forced expiratory volume in 1 sec and peak expiratory flow using digital spirometer.ResultsAll measures were recorded in definite values and the children were also classified into second-hand smoking (SH), or non-exposed to tobacco smoking (NE). The findings presented a significant increase (p<0.05) of the study groups in forced vital capacity, forced expiratory volume in 1 sec and peak expiratory flow solely for the non-exposed children. However, there were non-significant differences between the cyclists and football players or between the passive smoking children and non-exposed children in any of the two study groups (p>0.05).ConclusionThe outcomes of this study suggest beneficial influences of the sports activity on the lung functions, without different influences of the cyclists and football players on the lung functions.  相似文献   
76.
77.
As millions of people turn to social media for health information, better understanding the factors that guide health-related judgments and perceptions in this context is imperative. We report on two Web experiments (n > 400 total) examining the power of society’s widespread weight bias and related stereotypes to influence nutrition judgments in social media spaces. In Experiment 1, meals were judged as lower in nutritional quality when the person who recommended them (the source) was depicted as obese rather than of normal weight, an effect mediated by stereotypic beliefs about the source as a generally unhealthy person. Experiment 2 replicated this effect, which—notably—remained significant when controlling for objective nutritional information (calories and fat content). Results highlight spillover effects of weight bias that extend beyond person perception to color impressions of objects (here, food) that are associated with stigmatized attributes. Implications for everyday nutrition judgments and public health are considered.  相似文献   
78.
79.
80.
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