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   5041875篇
  免费   398416篇
  国内免费   16098篇
耳鼻咽喉   71938篇
儿科学   159392篇
妇产科学   134484篇
基础医学   752161篇
口腔科学   144371篇
临床医学   458808篇
内科学   918479篇
皮肤病学   117322篇
神经病学   425509篇
特种医学   200402篇
外国民族医学   1272篇
外科学   757707篇
综合类   147789篇
现状与发展   23篇
一般理论   2927篇
预防医学   427323篇
眼科学   120419篇
药学   359980篇
  24篇
中国医学   12910篇
肿瘤学   243149篇
  2021年   56785篇
  2019年   59359篇
  2018年   75630篇
  2017年   57899篇
  2016年   64601篇
  2015年   77270篇
  2014年   112333篇
  2013年   177924篇
  2012年   140159篇
  2011年   147068篇
  2010年   130014篇
  2009年   131021篇
  2008年   133742篇
  2007年   142897篇
  2006年   150993篇
  2005年   145347篇
  2004年   146097篇
  2003年   135858篇
  2002年   126283篇
  2001年   191476篇
  2000年   189527篇
  1999年   171422篇
  1998年   76282篇
  1997年   71332篇
  1996年   69162篇
  1995年   64958篇
  1994年   59034篇
  1993年   54767篇
  1992年   130125篇
  1991年   125049篇
  1990年   120105篇
  1989年   116771篇
  1988年   108570篇
  1987年   106952篇
  1986年   101730篇
  1985年   99295篇
  1984年   81017篇
  1983年   71561篇
  1982年   53492篇
  1981年   49393篇
  1980年   46450篇
  1979年   73598篇
  1978年   57116篇
  1977年   49785篇
  1976年   46539篇
  1975年   46732篇
  1974年   54147篇
  1973年   52019篇
  1972年   48743篇
  1971年   45118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.
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