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   4978305篇
  免费   380469篇
  国内免费   15881篇
耳鼻咽喉   69314篇
儿科学   159861篇
妇产科学   133237篇
基础医学   746366篇
口腔科学   137324篇
临床医学   457459篇
内科学   908852篇
皮肤病学   119271篇
神经病学   415805篇
特种医学   192522篇
外国民族医学   1128篇
外科学   744326篇
综合类   140117篇
现状与发展   25篇
一般理论   2861篇
预防医学   413065篇
眼科学   117160篇
药学   353061篇
  26篇
中国医学   13502篇
肿瘤学   249373篇
  2021年   56948篇
  2019年   59402篇
  2018年   76328篇
  2017年   58680篇
  2016年   65063篇
  2015年   77375篇
  2014年   111758篇
  2013年   177487篇
  2012年   143907篇
  2011年   152138篇
  2010年   131694篇
  2009年   131552篇
  2008年   137378篇
  2007年   147341篇
  2006年   154865篇
  2005年   148938篇
  2004年   149215篇
  2003年   138954篇
  2002年   127820篇
  2001年   200039篇
  2000年   196831篇
  1999年   176385篇
  1998年   75903篇
  1997年   70649篇
  1996年   68569篇
  1995年   64038篇
  1994年   57901篇
  1993年   53625篇
  1992年   128277篇
  1991年   122366篇
  1990年   117856篇
  1989年   114470篇
  1988年   105324篇
  1987年   103286篇
  1986年   97077篇
  1985年   94662篇
  1984年   76937篇
  1983年   67763篇
  1982年   51315篇
  1981年   47357篇
  1980年   44338篇
  1979年   66530篇
  1978年   52302篇
  1977年   45909篇
  1976年   42593篇
  1975年   43133篇
  1974年   47937篇
  1973年   46027篇
  1972年   43242篇
  1971年   40033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