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   5415259篇
  免费   407684篇
  国内免费   16125篇
耳鼻咽喉   76294篇
儿科学   174023篇
妇产科学   145000篇
基础医学   800217篇
口腔科学   153214篇
临床医学   503008篇
内科学   987240篇
皮肤病学   126205篇
神经病学   448700篇
特种医学   210945篇
外国民族医学   1184篇
外科学   803925篇
综合类   151695篇
现状与发展   25篇
一般理论   3076篇
预防医学   457234篇
眼科学   128406篇
药学   386564篇
  28篇
中国医学   13776篇
肿瘤学   268309篇
  2021年   57390篇
  2019年   59638篇
  2018年   77481篇
  2017年   59508篇
  2016年   65935篇
  2015年   78018篇
  2014年   112608篇
  2013年   178378篇
  2012年   154276篇
  2011年   165148篇
  2010年   135269篇
  2009年   133763篇
  2008年   150251篇
  2007年   162381篇
  2006年   168326篇
  2005年   162893篇
  2004年   163109篇
  2003年   152507篇
  2002年   141112篇
  2001年   215634篇
  2000年   213529篇
  1999年   189922篇
  1998年   78260篇
  1997年   72271篇
  1996年   70514篇
  1995年   66047篇
  1994年   59958篇
  1993年   55611篇
  1992年   142403篇
  1991年   137567篇
  1990年   132969篇
  1989年   128893篇
  1988年   119155篇
  1987年   117067篇
  1986年   110785篇
  1985年   107645篇
  1984年   86225篇
  1983年   75674篇
  1982年   54684篇
  1981年   50342篇
  1980年   47303篇
  1979年   77131篇
  1978年   59494篇
  1977年   51882篇
  1976年   48208篇
  1975年   49948篇
  1974年   56874篇
  1973年   54919篇
  1972年   51585篇
  1971年   47853篇
排序方式: 共有10000条查询结果,搜索用时 0 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.
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   

8.
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