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   2967551篇
  免费   216935篇
  国内免费   4422篇
耳鼻咽喉   41543篇
儿科学   92071篇
妇产科学   79017篇
基础医学   432921篇
口腔科学   84501篇
临床医学   266675篇
内科学   574050篇
皮肤病学   64509篇
神经病学   233727篇
特种医学   112403篇
外国民族医学   557篇
外科学   455544篇
综合类   60838篇
现状与发展   12篇
一般理论   1030篇
预防医学   224903篇
眼科学   69596篇
药学   223913篇
  14篇
中国医学   6027篇
肿瘤学   165057篇
  2019年   23020篇
  2018年   32274篇
  2017年   24393篇
  2016年   27454篇
  2015年   30873篇
  2014年   43424篇
  2013年   64986篇
  2012年   89399篇
  2011年   94747篇
  2010年   56331篇
  2009年   53414篇
  2008年   89878篇
  2007年   95590篇
  2006年   96924篇
  2005年   93852篇
  2004年   89917篇
  2003年   86693篇
  2002年   84262篇
  2001年   142751篇
  2000年   146758篇
  1999年   123317篇
  1998年   34159篇
  1997年   29901篇
  1996年   30160篇
  1995年   28469篇
  1994年   26247篇
  1993年   24563篇
  1992年   95495篇
  1991年   92658篇
  1990年   90471篇
  1989年   87254篇
  1988年   80069篇
  1987年   78515篇
  1986年   73302篇
  1985年   70576篇
  1984年   51865篇
  1983年   44152篇
  1982年   25296篇
  1979年   47191篇
  1978年   33184篇
  1977年   27806篇
  1976年   26028篇
  1975年   28178篇
  1974年   34017篇
  1973年   32259篇
  1972年   30333篇
  1971年   28796篇
  1970年   26805篇
  1969年   25511篇
  1968年   23243篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
21.
22.
23.
Maternal and Child Health Journal - Early life exposures can have an impact on a child’s developmental trajectory and children born late preterm (34–36 weeks gestational age)...  相似文献   
24.
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   
25.
Introduction: Percutaneous renal mass biopsy has evolved over the last decade with improvements on previous pitfalls including low tissue yield, high non-diagnostic rates, and complications. As understanding of tumor biology and natural history of renal cortical neoplasms has improved, percutaneous renal mass biopsy is poised to have an expanding role in an area characterized by individualized management and refined risk stratification.

Areas covered: This review summarizes the evolution of renal mass biopsy to its current state with respect to outcomes, indications, and clinical guidelines.

Expert opinion: With improved understanding of differential biological potential of renal cortical neoplasms combined with technical improvements in diagnostic yield and accuracy, utilization of renal mass biopsy is becoming an important adjunct to patient care in a broad range of clinical scenarios, including active surveillance, thermal ablation, and use of primary systemic therapy in localized and advanced settings.  相似文献   

26.
27.
28.
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   
29.
30.
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