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   4758497篇
  免费   374062篇
  国内免费   15870篇
耳鼻咽喉   68196篇
儿科学   144899篇
妇产科学   124167篇
基础医学   715519篇
口腔科学   135308篇
临床医学   431315篇
内科学   865938篇
皮肤病学   111978篇
神经病学   400095篇
特种医学   188213篇
外国民族医学   967篇
外科学   728145篇
综合类   135808篇
现状与发展   23篇
一般理论   2698篇
预防医学   394819篇
眼科学   112887篇
药学   340580篇
  26篇
中国医学   12569篇
肿瘤学   234279篇
  2021年   56026篇
  2019年   58862篇
  2018年   74330篇
  2017年   56837篇
  2016年   63260篇
  2015年   76249篇
  2014年   111094篇
  2013年   176475篇
  2012年   128460篇
  2011年   133534篇
  2010年   126372篇
  2009年   128270篇
  2008年   121089篇
  2007年   129013篇
  2006年   137913篇
  2005年   132937篇
  2004年   133700篇
  2003年   123995篇
  2002年   114537篇
  2001年   184717篇
  2000年   182140篇
  1999年   165357篇
  1998年   74515篇
  1997年   69912篇
  1996年   67739篇
  1995年   63513篇
  1994年   57509篇
  1993年   53341篇
  1992年   123795篇
  1991年   118726篇
  1990年   113403篇
  1989年   110672篇
  1988年   102520篇
  1987年   100588篇
  1986年   95255篇
  1985年   93201篇
  1984年   76218篇
  1983年   67432篇
  1982年   51360篇
  1981年   47571篇
  1980年   44618篇
  1979年   67443篇
  1978年   52895篇
  1977年   46785篇
  1976年   43028篇
  1975年   43254篇
  1974年   49138篇
  1973年   46924篇
  1972年   44129篇
  1971年   40754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