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   1337710篇
  免费   96238篇
  国内免费   2924篇
耳鼻咽喉   19787篇
儿科学   40292篇
妇产科学   38692篇
基础医学   187693篇
口腔科学   39853篇
临床医学   113122篇
内科学   263067篇
皮肤病学   30223篇
神经病学   106602篇
特种医学   53776篇
外国民族医学   435篇
外科学   208885篇
综合类   31099篇
现状与发展   6篇
一般理论   440篇
预防医学   92331篇
眼科学   31478篇
药学   100274篇
  4篇
中国医学   2989篇
肿瘤学   75824篇
  2018年   11892篇
  2015年   11998篇
  2014年   16869篇
  2013年   25428篇
  2012年   33268篇
  2011年   35149篇
  2010年   20892篇
  2009年   20361篇
  2008年   33808篇
  2007年   36908篇
  2006年   37458篇
  2005年   36202篇
  2004年   35267篇
  2003年   34213篇
  2002年   33737篇
  2001年   63644篇
  2000年   65344篇
  1999年   55418篇
  1998年   14682篇
  1997年   13477篇
  1996年   12954篇
  1995年   12237篇
  1994年   11487篇
  1992年   42774篇
  1991年   41288篇
  1990年   40559篇
  1989年   39558篇
  1988年   36975篇
  1987年   36418篇
  1986年   34903篇
  1985年   33106篇
  1984年   24829篇
  1983年   21058篇
  1982年   12667篇
  1981年   11568篇
  1980年   10775篇
  1979年   23928篇
  1978年   17070篇
  1977年   14837篇
  1976年   13390篇
  1975年   15269篇
  1974年   18082篇
  1973年   17561篇
  1972年   16811篇
  1971年   15717篇
  1970年   14916篇
  1969年   14352篇
  1968年   13460篇
  1967年   12017篇
  1966年   11263篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
INTRODUCTIONPsoriasis is a chronic inflammatory condition that affects the skin and joints, and is associated with cardiovascular risk factors, including metabolic syndrome (MetS). We aimed to assess the prevalence of MetS in patients with psoriasis and determine whether there was a correlation between psoriasis severity and MetS in a Singapore population.METHODSThis was a cross-sectional study of patients with psoriasis, aged 18–69 years, who attended a tertiary dermatology referral centre in Singapore from October 2007 to February 2009. Fasting glucose, lipids, blood pressure, Psoriasis Area and Severity Index, and body mass index were measured. MetS was diagnosed in the presence of three or more criteria of the modified National Cholesterol Education Program Adult Treatment Panel III.RESULTSAmong 338 patients with psoriasis, there were 238 (70.4%) men and 100 (29.6%) women, who were Chinese (n = 228; 67.5%), Malay (n = 52; 15.4%) and Indian (n = 58; 17.2%). The prevalence of MetS was 45.1%. MetS was 44% more prevalent in patients older than 50 years (p = 0.02). Malay patients with psoriasis were significantly more likely to have hypertriglyceridaemia, elevated fasting plasma glucose and abdominal obesity. There was no significant correlation between psoriasis severity and risk of MetS.CONCLUSIONThe prevalence of MetS in patients with psoriasis in Singapore was 45.1%, or nearly threefold higher than the Singapore general population. Patients with psoriasis should be screened yearly for MetS and any modifiable cardiovascular risk factors should be actively controlled.  相似文献   
42.
European Journal of Orthopaedic Surgery & Traumatology - The goals of this study were to compare patient satisfaction and wound-related complications in patients receiving 2-octyl cyanoacrylate...  相似文献   
43.
44.
45.
46.
Porocarcinoma is an unusual, locally aggressive and potentially fatal neoplasm. Several cutaneous malignancies have been described in association with porocarcinoma, including squamous cell carcinoma, basal cell carcinoma and tricholemmal carcinoma. Previous reports have indicated that the occurrence of malignant tumours in combination with porocarcinoma is extremely rare, in particular with regard to Bowen disease (BD). We report an uncommon case of porocarcinoma occurring synchronously in a single BD lesion in a 63‐year‐old woman with multiple BD lesions. The clinical and histological findings confirmed this diagnosis.  相似文献   
47.
Children who expect they can bring about good outcomes and avoid bad outcomes tend to experience more personal successes. Little is known about factors that contribute to these ‘control expectancies’. The purpose of the present study was to determine whether children's internal control expectancies occur in the context of parents’ internal control expectancies, low family strain, and high family cohesiveness and whether these factors are more strongly related to daughters’ than sons’ control expectancies. A community sample of 85 children aged 9–11 years and their parents (85 mothers; 63 fathers) completed rating scales. Fathers’ more internal control expectancies and mothers’ reports of fewer family strains were associated with daughters’ but not sons’ greater internal control expectancies, and greater family cohesiveness was related to both daughters’ and sons’ internal control orientations. These findings suggest that family factors may contribute to children's, particularly daughters’, development of internal control expectancies.  相似文献   
48.
49.
50.
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