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   3652278篇
  免费   311293篇
  国内免费   14526篇
耳鼻咽喉   49225篇
儿科学   116190篇
妇产科学   95073篇
基础医学   577477篇
口腔科学   96809篇
临床医学   330798篇
内科学   654564篇
皮肤病学   95218篇
神经病学   316960篇
特种医学   143295篇
外国民族医学   503篇
外科学   561147篇
综合类   109337篇
现状与发展   25篇
一般理论   2467篇
预防医学   304851篇
眼科学   84027篇
药学   251322篇
  19篇
中国医学   10716篇
肿瘤学   178074篇
  2021年   56554篇
  2020年   35991篇
  2019年   59377篇
  2018年   73587篇
  2017年   55904篇
  2016年   61992篇
  2015年   75496篇
  2014年   110309篇
  2013年   176202篇
  2012年   111206篇
  2011年   113198篇
  2010年   122146篇
  2009年   125694篇
  2008年   98693篇
  2007年   103554篇
  2006年   113246篇
  2005年   108413篇
  2004年   109108篇
  2003年   98764篇
  2002年   87877篇
  2001年   118838篇
  2000年   112163篇
  1999年   108122篇
  1998年   67342篇
  1997年   64763篇
  1996年   62457篇
  1995年   57880篇
  1994年   51828篇
  1993年   48346篇
  1992年   74485篇
  1991年   70128篇
  1990年   65828篇
  1989年   64626篇
  1988年   59563篇
  1987年   58271篇
  1986年   54812篇
  1985年   54631篇
  1984年   49694篇
  1983年   45255篇
  1982年   42352篇
  1981年   39709篇
  1980年   37375篇
  1979年   40346篇
  1978年   35697篇
  1977年   32389篇
  1976年   29724篇
  1975年   28031篇
  1974年   29100篇
  1973年   28123篇
  1972年   26310篇
排序方式: 共有10000条查询结果,搜索用时 687 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.
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   
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