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   5660169篇
  免费   424224篇
  国内免费   16980篇
耳鼻咽喉   82248篇
儿科学   178917篇
妇产科学   152061篇
基础医学   829768篇
口腔科学   162221篇
临床医学   521740篇
内科学   1027286篇
皮肤病学   130141篇
神经病学   466021篇
特种医学   221526篇
外国民族医学   1441篇
外科学   852217篇
综合类   162750篇
现状与发展   24篇
一般理论   3078篇
预防医学   478953篇
眼科学   137671篇
药学   405226篇
  27篇
中国医学   14442篇
肿瘤学   273615篇
  2021年   57128篇
  2019年   59508篇
  2018年   77501篇
  2017年   59413篇
  2016年   66317篇
  2015年   78010篇
  2014年   112981篇
  2013年   178641篇
  2012年   161689篇
  2011年   173771篇
  2010年   137179篇
  2009年   134855篇
  2008年   158850篇
  2007年   172448篇
  2006年   178425篇
  2005年   173309篇
  2004年   172992篇
  2003年   162276篇
  2002年   151981篇
  2001年   218939篇
  2000年   217796篇
  1999年   193675篇
  1998年   79688篇
  1997年   73243篇
  1996年   71004篇
  1995年   66677篇
  1994年   60703篇
  1993年   56122篇
  1992年   146696篇
  1991年   142752篇
  1990年   138062篇
  1989年   133735篇
  1988年   124230篇
  1987年   122106篇
  1986年   115559篇
  1985年   112816篇
  1984年   90272篇
  1983年   79233篇
  1982年   56455篇
  1981年   51962篇
  1979年   83484篇
  1978年   63620篇
  1977年   54941篇
  1976年   51786篇
  1975年   53461篇
  1974年   62478篇
  1973年   60056篇
  1972年   56800篇
  1971年   52698篇
  1970年   49367篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
BackgroundThe aim of this study was to estimate the prevalence of dental prosthetic treatment and to investigate the demographic, social, economic and medical factors associated with the use of fixed and removable dentures in a representative sample of adults living in France.MethodsThe data were obtained from the 2002–2003 Decennial Health Survey, a cross-sectional study of a representative sample of the population living in France, which included 29,679 adults. Information was collected by interview. The variables collected were fixed denture, removable denture, age, gender, number of children, area of residence, nationality, educational attainment, family social status, employment status, annual household income per capita, supplementary insurance, chronic disease, eyesight problems/glasses, hearing problems/hearing aids. Multinomial logistic regression models were used to study the relationship between prosthetic treatment and demographic, socioeconomic and medical characteristics unadjusted, adjusted for age and adjusted for all the characteristics.ResultsThe prevalence of prosthetic treatment was 34.6% (95% confidence interval (CI): [34.1; 35.2]) for fixed prosthetic dentures and 13.8% (95% CI: [13.4; 14.2]) for removable prosthetic dentures. We showed a gradient between educational attainment and removable dentures; the odds ratio adjusted for all the variables (aOR) associated with no or primary education compared to post-secondary education was 2.56; 95% CI: [2.09; 3.13]. When annual household income per capita was low, subjects were less likely to report fixed dentures (aOR = 0.68; 95% CI: [0.62; 0.75]) than those with high annual household income per capita. Individuals without insurance less often reported fixed dentures than those with private insurance. Those reporting chronic disease were less likely to report fixed dentures (aOR = 0.87; 95% CI: [0.79; 0.95]) but more likely to report removable dentures (aOR = 1.29; 95% CI: [1.17; 1.43]) than those without chronic disease.ConclusionThis study reveals social, economic and medical inequalities in fixed and removable prosthetic treatment among adults in France.  相似文献   
5.
6.
7.
8.
Background: Traumatic brain injury (TBI) results in verbal recall deficits and impaired processing of emotion encoded in facial appearance, prosody and the linguistic content of messages. Emotion facilitates memory (emotional memory advantage) for non-brain injured (NBI) individuals but the impact of emotion on verbal recall for linguistically encoded stimuli in TBI has not been explored.

Aims: The purpose of this study was to determine the effects of stimulus emotional content on verbal recall of words and paragraphs in TBI compared to NBI individuals.

Methods and procedures: Six 10-item lists, each with five emotional and five neutral words, and six paragraphs (three emotional, three neutral) were counterbalanced and presented in random order to 20 individuals with TBI and 44 NBI. The number of words from lists and the number of content units from paragraphs were compared for the two groups.

Outcomes and results: The NBI participants recalled more words from the lists and content units from the paragraphs than the individuals with TBI. Both groups recalled significantly more emotional than neutral words. NBI but not TBI participants had significantly greater recall for information in paragraphs with emotional content.

Conclusions: Participants with TBI showed impaired recall of words and paragraph content. Emotion facilitated word and paragraph content recall for neurotypical individuals but emotional memory advantage was limited to words for the TBI participants.  相似文献   

9.
10.
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