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   3450718篇
  免费   306245篇
  国内免费   13851篇
耳鼻咽喉   47632篇
儿科学   109272篇
妇产科学   87832篇
基础医学   551234篇
口腔科学   93252篇
临床医学   313479篇
内科学   613994篇
皮肤病学   89391篇
神经病学   298642篇
特种医学   138538篇
外国民族医学   299篇
外科学   536098篇
综合类   106133篇
现状与发展   24篇
一般理论   2297篇
预防医学   292623篇
眼科学   78833篇
药学   238347篇
  23篇
中国医学   9561篇
肿瘤学   163310篇
  2021年   55160篇
  2020年   35122篇
  2019年   58153篇
  2018年   71472篇
  2017年   54027篇
  2016年   59735篇
  2015年   73840篇
  2014年   108211篇
  2013年   173252篇
  2012年   93494篇
  2011年   93545篇
  2010年   116910篇
  2009年   121239篇
  2008年   80562篇
  2007年   83819篇
  2006年   94362篇
  2005年   89906篇
  2004年   91716篇
  2003年   82606篇
  2002年   71693篇
  2001年   111080篇
  2000年   104660篇
  1999年   102231篇
  1998年   66206篇
  1997年   63827篇
  1996年   62012篇
  1995年   57763篇
  1994年   51775篇
  1993年   48372篇
  1992年   73525篇
  1991年   70253篇
  1990年   66575篇
  1989年   65128篇
  1988年   60400篇
  1987年   59062篇
  1986年   55898篇
  1985年   55990篇
  1984年   50444篇
  1983年   45774篇
  1982年   42555篇
  1981年   39984篇
  1980年   37680篇
  1979年   41779篇
  1978年   36572篇
  1977年   33127篇
  1976年   30462篇
  1975年   29041篇
  1974年   30280篇
  1973年   29046篇
  1972年   27047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