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   4271977篇
  免费   332961篇
  国内免费   14501篇
耳鼻咽喉   59316篇
儿科学   136429篇
妇产科学   111767篇
基础医学   657845篇
口腔科学   114771篇
临床医学   386432篇
内科学   772039篇
皮肤病学   106926篇
神经病学   354740篇
特种医学   165427篇
外国民族医学   520篇
外科学   654224篇
综合类   120506篇
现状与发展   23篇
一般理论   2597篇
预防医学   356122篇
眼科学   99650篇
药学   298772篇
  28篇
中国医学   11712篇
肿瘤学   209593篇
  2021年   56870篇
  2020年   36176篇
  2019年   59321篇
  2018年   74779篇
  2017年   57130篇
  2016年   63284篇
  2015年   76417篇
  2014年   111005篇
  2013年   176576篇
  2012年   124089篇
  2011年   129823篇
  2010年   127003篇
  2009年   128095篇
  2008年   115642篇
  2007年   123132篇
  2006年   131551篇
  2005年   126587篇
  2004年   127085篇
  2003年   117369篇
  2002年   106639篇
  2001年   151372篇
  2000年   146102篇
  1999年   135512篇
  1998年   70518篇
  1997年   66527篇
  1996年   64662篇
  1995年   59923篇
  1994年   53981篇
  1993年   50201篇
  1992年   96796篇
  1991年   93419篇
  1990年   89706篇
  1989年   87475篇
  1988年   80597篇
  1987年   79083篇
  1986年   74402篇
  1985年   73480篇
  1984年   61985篇
  1983年   55737篇
  1982年   46159篇
  1981年   43225篇
  1980年   40602篇
  1979年   53365篇
  1978年   44215篇
  1977年   39051篇
  1976年   36439篇
  1975年   36501篇
  1974年   39685篇
  1973年   37890篇
  1972年   35491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.
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