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   3486218篇
  免费   296960篇
  国内免费   13910篇
耳鼻咽喉   47757篇
儿科学   110393篇
妇产科学   88708篇
基础医学   553878篇
口腔科学   93606篇
临床医学   317462篇
内科学   617382篇
皮肤病学   89933篇
神经病学   300441篇
特种医学   138807篇
外国民族医学   299篇
外科学   537319篇
综合类   106481篇
现状与发展   24篇
一般理论   2341篇
预防医学   298427篇
眼科学   79462篇
药学   240061篇
  24篇
中国医学   9640篇
肿瘤学   164643篇
  2021年   55496篇
  2020年   35335篇
  2019年   58491篇
  2018年   71970篇
  2017年   54792篇
  2016年   60468篇
  2015年   74480篇
  2014年   108942篇
  2013年   174114篇
  2012年   95771篇
  2011年   95802篇
  2010年   117680篇
  2009年   121731篇
  2008年   82177篇
  2007年   85475篇
  2006年   95807篇
  2005年   91192篇
  2004年   92856篇
  2003年   83462篇
  2002年   72327篇
  2001年   111339篇
  2000年   104947篇
  1999年   102483篇
  1998年   66286篇
  1997年   63877篇
  1996年   62083篇
  1995年   57825篇
  1994年   51826篇
  1993年   48401篇
  1992年   73724篇
  1991年   70445篇
  1990年   66745篇
  1989年   65312篇
  1988年   60561篇
  1987年   59241篇
  1986年   56054篇
  1985年   56158篇
  1984年   50547篇
  1983年   45884篇
  1982年   42601篇
  1981年   40020篇
  1980年   37715篇
  1979年   41898篇
  1978年   36666篇
  1977年   33192篇
  1976年   30538篇
  1975年   29120篇
  1974年   30369篇
  1973年   29166篇
  1972年   27133篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
81.
82.
83.
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   
84.
85.
86.
87.
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   

88.
89.
90.
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