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   2370510篇
  免费   172392篇
  国内免费   4280篇
耳鼻咽喉   33494篇
儿科学   74238篇
妇产科学   67446篇
基础医学   342272篇
口腔科学   69135篇
临床医学   212019篇
内科学   459905篇
皮肤病学   52681篇
神经病学   189734篇
特种医学   90964篇
外国民族医学   676篇
外科学   353291篇
综合类   52417篇
现状与发展   8篇
一般理论   957篇
预防医学   181240篇
眼科学   55200篇
药学   177061篇
  10篇
中国医学   4683篇
肿瘤学   129751篇
  2018年   23070篇
  2016年   19879篇
  2015年   22728篇
  2014年   31585篇
  2013年   48449篇
  2012年   64545篇
  2011年   68577篇
  2010年   40314篇
  2009年   38856篇
  2008年   65394篇
  2007年   70608篇
  2006年   70834篇
  2005年   68922篇
  2004年   66705篇
  2003年   64178篇
  2002年   62782篇
  2001年   107354篇
  2000年   109833篇
  1999年   92985篇
  1998年   25712篇
  1997年   23382篇
  1996年   23210篇
  1995年   21864篇
  1994年   20502篇
  1992年   73083篇
  1991年   71429篇
  1990年   69657篇
  1989年   67938篇
  1988年   63129篇
  1987年   62052篇
  1986年   59515篇
  1985年   56208篇
  1984年   42535篇
  1983年   36583篇
  1982年   21872篇
  1981年   19891篇
  1979年   40743篇
  1978年   29502篇
  1977年   25108篇
  1976年   23141篇
  1975年   25653篇
  1974年   30765篇
  1973年   30118篇
  1972年   28802篇
  1971年   26859篇
  1970年   25413篇
  1969年   24316篇
  1968年   22715篇
  1967年   20445篇
  1966年   19219篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
93.
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   
94.
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   
95.
96.
97.
98.
99.
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   
100.
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   
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