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   4888638篇
  免费   401017篇
  国内免费   16536篇
耳鼻咽喉   70958篇
儿科学   155589篇
妇产科学   129295篇
基础医学   727450篇
口腔科学   135833篇
临床医学   451570篇
内科学   896471篇
皮肤病学   117706篇
神经病学   413010篇
特种医学   194564篇
外国民族医学   1327篇
外科学   747864篇
综合类   140104篇
现状与发展   91篇
一般理论   2758篇
预防医学   410771篇
眼科学   116729篇
药学   344780篇
  25篇
中国医学   12582篇
肿瘤学   236714篇
  2021年   57312篇
  2019年   59796篇
  2018年   78054篇
  2017年   60378篇
  2016年   67152篇
  2015年   79835篇
  2014年   117318篇
  2013年   182706篇
  2012年   135914篇
  2011年   142299篇
  2010年   132420篇
  2009年   135054篇
  2008年   129173篇
  2007年   137684篇
  2006年   146484篇
  2005年   140574篇
  2004年   140892篇
  2003年   131113篇
  2002年   121285篇
  2001年   185027篇
  2000年   182429篇
  1999年   165759篇
  1998年   76593篇
  1997年   71485篇
  1996年   69061篇
  1995年   64770篇
  1994年   58577篇
  1993年   54198篇
  1992年   123852篇
  1991年   119718篇
  1990年   114373篇
  1989年   111162篇
  1988年   103095篇
  1987年   101408篇
  1986年   95913篇
  1985年   93568篇
  1984年   76917篇
  1983年   67921篇
  1982年   51744篇
  1981年   48015篇
  1980年   45046篇
  1979年   68504篇
  1978年   53749篇
  1977年   47134篇
  1976年   44060篇
  1975年   44332篇
  1974年   50343篇
  1973年   48331篇
  1972年   45258篇
  1971年   41512篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
81.
82.
83.
We review the spectrum of cutaneous disorders associated with inflammatory and neoplastic plasmacytic pathology. Because plasma cells are derived from B‐lymphocytes our overview includes discussion of certain lymphoplasmacytic proliferations. It is structured along histopathological lines, addressing conditions characterized by (a) cutaneous plasma cell infiltrates, (b) deposits of plasma cell products or their derivatives in the skin and (c) miscellaneous, poorly understood cutaneous complications of plasmacytic disorders. Lesions arising primarily in the skin and those due to cutaneous involvement by multisystem disorders are addressed. The range includes a spectrum of tumefactive and circulatory manifestations. We highlight key clinical and pathological features of the different conditions and outline recent advances in our understanding of these entities. By emphasizing the dermatopathological characteristics of this spectrum of disorders we hope to hone the diagnostic accuracy of practitioners in the field.  相似文献   
84.
85.
86.
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   
87.
88.
89.
90.
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