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   2388498篇
  免费   185001篇
  国内免费   4675篇
耳鼻咽喉   33303篇
儿科学   80352篇
妇产科学   67061篇
基础医学   339039篇
口腔科学   64983篇
临床医学   214409篇
内科学   472756篇
皮肤病学   53828篇
神经病学   192679篇
特种医学   92727篇
外国民族医学   1051篇
外科学   361184篇
综合类   54220篇
现状与发展   4篇
一般理论   802篇
预防医学   186818篇
眼科学   54010篇
药学   173030篇
  3篇
中国医学   5064篇
肿瘤学   130851篇
  2019年   18472篇
  2018年   26340篇
  2017年   19921篇
  2016年   22267篇
  2015年   25026篇
  2014年   35316篇
  2013年   53212篇
  2012年   72704篇
  2011年   77056篇
  2010年   45646篇
  2009年   43405篇
  2008年   72149篇
  2007年   76730篇
  2006年   77393篇
  2005年   75271篇
  2004年   72641篇
  2003年   69613篇
  2002年   67930篇
  2001年   116959篇
  2000年   120453篇
  1999年   101300篇
  1998年   28335篇
  1997年   25590篇
  1996年   25940篇
  1995年   24659篇
  1994年   22735篇
  1993年   21290篇
  1992年   78297篇
  1991年   75604篇
  1990年   73059篇
  1989年   69628篇
  1988年   64053篇
  1987年   62836篇
  1986年   58696篇
  1985年   56160篇
  1984年   42579篇
  1983年   35921篇
  1982年   21478篇
  1981年   19288篇
  1979年   37898篇
  1978年   26578篇
  1977年   22256篇
  1976年   20946篇
  1975年   22162篇
  1974年   26317篇
  1973年   25406篇
  1972年   23569篇
  1971年   21391篇
  1970年   20332篇
  1969年   18582篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
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   
4.
5.
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   

6.
7.
Metabolism describes the series of chemical reactions that are concerned with the provision of energy to biological systems. They may be divided into reactions involved in energy yield (catabolism: demand exceeds supply), and energy storage (anabolism: supply exceeds demand). Regulation of these pathways is critical for homeostasis, and derangements in metabolism are seen in a wide variety of pathological processes. Understanding metabolism is key to the treatment of many diseases, notably diabetes, as well as underpinning clinical nutritional support.  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