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   3541290篇
  免费   296888篇
  国内免费   16183篇
耳鼻咽喉   48103篇
儿科学   112490篇
妇产科学   92150篇
基础医学   558075篇
口腔科学   96297篇
临床医学   335895篇
内科学   622783篇
皮肤病学   92764篇
神经病学   305655篇
特种医学   136282篇
外国民族医学   392篇
外科学   536019篇
综合类   106434篇
现状与发展   58篇
一般理论   2295篇
预防医学   308021篇
眼科学   80775篇
药学   240685篇
  27篇
中国医学   10476篇
肿瘤学   168685篇
  2021年   56257篇
  2020年   37382篇
  2019年   58950篇
  2018年   74967篇
  2017年   58265篇
  2016年   63919篇
  2015年   77896篇
  2014年   113012篇
  2013年   178926篇
  2012年   100603篇
  2011年   101807篇
  2010年   121716篇
  2009年   126018篇
  2008年   87488篇
  2007年   90344篇
  2006年   100995篇
  2005年   95679篇
  2004年   96595篇
  2003年   86885篇
  2002年   76457篇
  2001年   108109篇
  2000年   101164篇
  1999年   100100篇
  1998年   66533篇
  1997年   64179篇
  1996年   61803篇
  1995年   57283篇
  1994年   51271篇
  1993年   47852篇
  1992年   71001篇
  1991年   68080篇
  1990年   64621篇
  1989年   62938篇
  1988年   58520篇
  1987年   57108篇
  1986年   54495篇
  1985年   54343篇
  1984年   49317篇
  1983年   44927篇
  1982年   42048篇
  1981年   39624篇
  1980年   37239篇
  1979年   40785篇
  1978年   35939篇
  1977年   32487篇
  1976年   30322篇
  1975年   28566篇
  1974年   30035篇
  1973年   28933篇
  1972年   27084篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
73.
Troppmair  Teresa  Egger  J.  Krösbacher  A.  Zanvettor  A.  Schinnerl  A.  Neumayr  A.  Baubin  M. 《Der Anaesthesist》2022,71(4):272-280
Die Anaesthesiologie - Die Qualität eines Rettungssystems zeichnet sich auch durch den effizienten Einsatz seiner personellen und Fahrzeugressourcen aus. So können im berechtigten Fall...  相似文献   
74.
75.
Despite orientation and mobility (O&M) being a significant factor determining quality of life of people with low vision or blindness, there are no gold standard measures or agreement on how to measure O&M performance. In the first part of this systematic review, an inventory of O&M outcome measures used by recent studies to assess the performance of orientation and/or mobility of adults with vision impairment (low vision and blindness) is presented. A wide variety of O&M outcome measures have been implemented in different fields of study, such as epidemiologic research and interventional studies evaluating training, assistive technology, vision rehabilitation and vision restoration. The most frequent aspect of outcome measures is efficiency such as time, distance, speed and percentage of preferred walking speed, followed by obstacle contacts and avoidance, and dis/orientation and veering. Other less commonly used aspects are target identification, safety and social interaction and self-reported outcome measures. Some studies employ sophisticated equipment to capture and analyse O&M performance in a laboratory setting, while others carry out their assessment in real-world indoor or outdoor environments. In the second part of this review, the appropriateness of implementing the identified outcome measures to assess O&M performance in clinical and functional O&M practice is evaluated. Nearly a half of these outcome measures meet all four criteria of face validity (either clinical or functional), responsiveness, reliability and feasibility and have the potential to be implemented in clinical or functional O&M practice. The findings of this review confirm the complicated and dynamic nature of O&M. Multiple measures are required in any evaluation of O&M performance to facilitate holistic assessment of O&M abilities and limitations of each individual.  相似文献   
76.
77.
78.
79.
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   
80.
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