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   4384368篇
  免费   348480篇
  国内免费   15115篇
耳鼻咽喉   60841篇
儿科学   141795篇
妇产科学   115464篇
基础医学   669011篇
口腔科学   123219篇
临床医学   395721篇
内科学   788611篇
皮肤病学   108883篇
神经病学   371551篇
特种医学   174654篇
外国民族医学   798篇
外科学   666697篇
综合类   129730篇
现状与发展   23篇
一般理论   2679篇
预防医学   363903篇
眼科学   103021篇
药学   308568篇
  23篇
中国医学   11664篇
肿瘤学   211107篇
  2021年   57142篇
  2020年   36561篇
  2019年   59745篇
  2018年   75504篇
  2017年   57811篇
  2016年   64457篇
  2015年   77661篇
  2014年   112426篇
  2013年   178827篇
  2012年   122644篇
  2011年   126795篇
  2010年   126928篇
  2009年   128677篇
  2008年   113134篇
  2007年   119981篇
  2006年   129189篇
  2005年   124121篇
  2004年   125656篇
  2003年   115641篇
  2002年   105087篇
  2001年   152786篇
  2000年   148322篇
  1999年   138176篇
  1998年   71361篇
  1997年   67601篇
  1996年   65407篇
  1995年   60985篇
  1994年   55195篇
  1993年   51249篇
  1992年   103011篇
  1991年   99307篇
  1990年   95862篇
  1989年   93416篇
  1988年   86483篇
  1987年   85403篇
  1986年   80989篇
  1985年   80117篇
  1984年   67452篇
  1983年   60034篇
  1982年   48588篇
  1981年   45215篇
  1980年   42501篇
  1979年   59774篇
  1978年   48193篇
  1977年   42597篇
  1976年   39643篇
  1975年   39281篇
  1974年   43826篇
  1973年   42227篇
  1972年   39266篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
5.
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   
6.
The current study explored the influence of three methods of parental emotion discourse (structured story-telling, reminiscing, and picture book) and their relation to preschoolers’ emotion understanding. Thirty-seven families participated in the study. Analyses showed that the structured story-telling method produced more emotion words, was high in unique emotion words, and was high for both emotion labelling and explanations. All three methods showed some potential to predict preschooler’s emotion understanding. Structured story-telling was best at predicting role-taking, while reminiscing and the picture book both were better at predicting situation knowledge. Additional studies are needed to further explore the influence of different methods of assessing emotion discourse to enhance validity and reliability of research in this field.  相似文献   
7.
8.
9.
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   

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