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   3573837篇
  免费   295806篇
  国内免费   14801篇
耳鼻咽喉   50229篇
儿科学   110248篇
妇产科学   93494篇
基础医学   559538篇
口腔科学   100592篇
临床医学   313709篇
内科学   642027篇
皮肤病学   95827篇
神经病学   305257篇
特种医学   140927篇
外国民族医学   454篇
外科学   555604篇
综合类   107607篇
现状与发展   24篇
一般理论   2293篇
预防医学   292385篇
眼科学   81679篇
药学   249826篇
  20篇
中国医学   10906篇
肿瘤学   171798篇
  2021年   56439篇
  2020年   35776篇
  2019年   59707篇
  2018年   73690篇
  2017年   55524篇
  2016年   61111篇
  2015年   75175篇
  2014年   109628篇
  2013年   175551篇
  2012年   97823篇
  2011年   98129篇
  2010年   118877篇
  2009年   122775篇
  2008年   84308篇
  2007年   88535篇
  2006年   98574篇
  2005年   93856篇
  2004年   95236篇
  2003年   86349篇
  2002年   76359篇
  2001年   112582篇
  2000年   106232篇
  1999年   104151篇
  1998年   65485篇
  1997年   63243篇
  1996年   60740篇
  1995年   56168篇
  1994年   50378篇
  1993年   47068篇
  1992年   72776篇
  1991年   68915篇
  1990年   65800篇
  1989年   65003篇
  1988年   60740篇
  1987年   59372篇
  1986年   56867篇
  1985年   56403篇
  1984年   50797篇
  1983年   45992篇
  1982年   42408篇
  1981年   39858篇
  1980年   37706篇
  1979年   43230篇
  1978年   37514篇
  1977年   34415篇
  1976年   31191篇
  1975年   30902篇
  1974年   32668篇
  1973年   31368篇
  1972年   29747篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
112.
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   
113.
114.
115.
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   

116.
117.
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   
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