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   4862924篇
  免费   384615篇
  国内免费   16010篇
耳鼻咽喉   69608篇
儿科学   154590篇
妇产科学   129193篇
基础医学   728692篇
口腔科学   135578篇
临床医学   443600篇
内科学   886944篇
皮肤病学   114035篇
神经病学   409015篇
特种医学   192998篇
外国民族医学   1327篇
外科学   734710篇
综合类   140352篇
现状与发展   23篇
一般理论   2780篇
预防医学   411236篇
眼科学   115467篇
药学   345644篇
  25篇
中国医学   12608篇
肿瘤学   235124篇
  2021年   56645篇
  2019年   59429篇
  2018年   75541篇
  2017年   57844篇
  2016年   64327篇
  2015年   76962篇
  2014年   111896篇
  2013年   177755篇
  2012年   135685篇
  2011年   142295篇
  2010年   128923篇
  2009年   130047篇
  2008年   128790篇
  2007年   138142篇
  2006年   145975篇
  2005年   140901篇
  2004年   141460篇
  2003年   131768篇
  2002年   121970篇
  2001年   184081篇
  2000年   181896篇
  1999年   165022篇
  1998年   75370篇
  1997年   70436篇
  1996年   68304篇
  1995年   64057篇
  1994年   58174篇
  1993年   53908篇
  1992年   123599篇
  1991年   119356篇
  1990年   114100篇
  1989年   110860篇
  1988年   102875篇
  1987年   101194篇
  1986年   95698篇
  1985年   93441篇
  1984年   76855篇
  1983年   67889篇
  1982年   51708篇
  1981年   47999篇
  1980年   45026篇
  1979年   68488篇
  1978年   53743篇
  1977年   47105篇
  1976年   44046篇
  1975年   44323篇
  1974年   50322篇
  1973年   48317篇
  1972年   45242篇
  1971年   41478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.
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.
Graefe's Archive for Clinical and Experimental Ophthalmology - The published online version contains mistake as the author's first name and last name have been interchanged as "Hild...  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