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   4615462篇
  免费   365021篇
  国内免费   16025篇
耳鼻咽喉   63380篇
儿科学   148018篇
妇产科学   121685篇
基础医学   702176篇
口腔科学   129172篇
临床医学   422244篇
内科学   833600篇
皮肤病学   114572篇
神经病学   379473篇
特种医学   179438篇
外国民族医学   614篇
外科学   702691篇
综合类   136110篇
现状与发展   23篇
一般理论   2657篇
预防医学   379898篇
眼科学   110956篇
药学   324198篇
  27篇
中国医学   13699篇
肿瘤学   231877篇
  2021年   56701篇
  2019年   59363篇
  2018年   75475篇
  2017年   57509篇
  2016年   63676篇
  2015年   76554篇
  2014年   111074篇
  2013年   176911篇
  2012年   128326篇
  2011年   134946篇
  2010年   128496篇
  2009年   128747篇
  2008年   120522篇
  2007年   128857篇
  2006年   136500篇
  2005年   131082篇
  2004年   132303篇
  2003年   121719篇
  2002年   110721篇
  2001年   179856篇
  2000年   175559篇
  1999年   159067篇
  1998年   74011篇
  1997年   69045篇
  1996年   66752篇
  1995年   62221篇
  1994年   56341篇
  1993年   52122篇
  1992年   115628篇
  1991年   111735篇
  1990年   107243篇
  1989年   104932篇
  1988年   96285篇
  1987年   94362篇
  1986年   89351篇
  1985年   87383篇
  1984年   71965篇
  1983年   63650篇
  1982年   49521篇
  1981年   46070篇
  1980年   43204篇
  1979年   62043篇
  1978年   49639篇
  1977年   44078篇
  1976年   40891篇
  1975年   41234篇
  1974年   45645篇
  1973年   43870篇
  1972年   40958篇
  1971年   37872篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
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   
112.
113.
114.
Introduction: Pharmacovigilance is essential to monitoring the safety profiles of authorized medicines. Compared with small-molecule drugs, biological drugs are more complex, more susceptible to structural variability due to manufacturing processes, and have the potential to induce immune-related reactions, underscoring the importance of safety monitoring for these products. Although highly similar to reference products, biosimilars are not expected to be structurally identical. For these reasons, proper reporting of potential adverse drug reactions (ADRs) using distinguishable names and batch numbers is essential for accurate tracing of all biological drugs. To address the need for robust pharmacovigilance, the European Parliament and Council of the European Union provided legislation regarding pharmacovigilance of biologics in 2010.

Areas covered: This narrative review examines the current state of pharmacovigilance for biologics in the European Union (EU) and discusses relevant information on pharmacovigilance of biosimilars, the current EU pharmacovigilance system, and areas that could be improved.

Expert opinion: Although steps have been taken to improve pharmacovigilance of biologics in the EU, several enhancements can still be made, including additional training for healthcare professionals on ADR reporting, the use of 2D barcodes that enhance traceability, and an open discussion of potentially missed opportunities in the pharmacovigilance of biosimilars.  相似文献   

115.
ABSTRACT

This project examined 55 picture books featuring transgender, gender expansive or genderqueer protagonists or narrators published between 2008 and 2018. The purpose of the study was to determine how this genre of children’s literature supports and challenges four gender assumptions: the gender binary, gender essentialism, sex/gender congruency and gender stability. Additionally, this critical analysis explored misgendering within this genre and themes of social rejection and acceptance. Protagonists and narrators were permitted a degree of gender nonconformity, however, the majority of picture books missed opportunities for a more complete exploration of gender possibilities.  相似文献   
116.
117.
118.
119.
120.
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