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   10827篇
  免费   697篇
  国内免费   50篇
耳鼻咽喉   83篇
儿科学   332篇
妇产科学   427篇
基础医学   1558篇
口腔科学   169篇
临床医学   1016篇
内科学   2472篇
皮肤病学   215篇
神经病学   1052篇
特种医学   152篇
外科学   982篇
综合类   69篇
一般理论   9篇
预防医学   1186篇
眼科学   273篇
药学   763篇
中国医学   44篇
肿瘤学   772篇
  2023年   79篇
  2022年   204篇
  2021年   396篇
  2020年   221篇
  2019年   309篇
  2018年   330篇
  2017年   243篇
  2016年   266篇
  2015年   328篇
  2014年   446篇
  2013年   541篇
  2012年   875篇
  2011年   922篇
  2010年   500篇
  2009年   425篇
  2008年   744篇
  2007年   747篇
  2006年   663篇
  2005年   624篇
  2004年   539篇
  2003年   485篇
  2002年   474篇
  2001年   107篇
  2000年   93篇
  1999年   84篇
  1998年   80篇
  1997年   45篇
  1996年   38篇
  1995年   46篇
  1994年   29篇
  1993年   31篇
  1992年   64篇
  1991年   48篇
  1990年   44篇
  1989年   70篇
  1988年   36篇
  1987年   51篇
  1986年   44篇
  1985年   35篇
  1984年   25篇
  1983年   30篇
  1982年   17篇
  1981年   27篇
  1980年   17篇
  1979年   19篇
  1978年   13篇
  1977年   12篇
  1973年   15篇
  1971年   10篇
  1969年   9篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
Case report A 28-year-old female patient was admitted because of painlessmacroscopic haematuria. Past history included severe mentalretardation and nystagmus. At age 17, a computed tomography(CT) scan of the brain showed an absent cerebellar vermis andcerebellar hypoplasia. There was no  相似文献   
3.
4.
5.
6.
As the biological width is established around neighboring implants, there is a flattening of the interimplant bone and a change in the position of the soft tissue. As a result, a normal progression of papilla from natural teeth through the adjacent implant area is lost. This presentation describes various techniques and strategies to improve the aesthetic outcome of anterior implant restorations, together with the use of a scalloped implant designed to sustain the interdental bony peaks, and in doing so, maintain the interimplant papillae.  相似文献   
7.

Objective  

The aim of the project was to assess the effectiveness and safety of weekly epoetin-beta (EB) in patients with gastrointestinal cancer (GIC) subjected to concomitant chemoradiotherapy (CCTRT).  相似文献   
8.
9.
Exposure to trauma and stress has been linked with poor health, while forgiveness appears to be positively associated with health outcomes. The current study investigates whether traits such as forgiveness and ruminative tendencies predict levels of trauma and stress experienced by New York City residents on the 1‐year anniversary of the September 11th terrorist attack. Seventy‐one students and staff members (57 females, 14 males) of a graduate school in New York City were administered the Impact of Events Scale, the Perceived Stress Scale, and questionnaires designed for the purpose of this study to measure ruminative tendencies and forgiveness on September 11, 2002. Rumination predicted levels of trauma (p < 0.05) and perceived stress (p < 0.01). Lower levels of forgiveness predicted perceived stress (p < 0.05), but not trauma. Rumination mediated the relationship between forgiveness and perceived stress. These findings suggest that individuals with higher levels of rumination have an elevated risk of experiencing trauma and stress‐related symptoms following a traumatic event. Forgiveness is associated with lower levels of stress, but not trauma, perhaps because trauma is an extreme form of stress. Forgiveness appears to serve as a buffer against stress more so in individuals with low levels of rumination than in individuals with high levels of rumination. Copyright © 2005 John Wiley & Sons, Ltd.  相似文献   
10.
Abstract Caries experience and enamel fluorosis prevalence in 8-year-old children belonging to different socio-economic classes were determined in two Chilean twin cities that are served by optimally fluoridated community water from the same waterworks facility. Low socio-economic status (LSES) children had a higher mean dm ft and DMFT indices (P<0.001) than high socioeconomic status (HSES) children. Prevalence of enamel fluorosis in the permanent teeth of LSES children was 0.79, significantly higher (X2= 9.0; P<0.003) than the value 0.59 found in HSES children. The proportion of Dean's scores 2. 3, 4 and 5 in first molars, mandibular and maxillary incisors in LSES children was higher than in HSES children (P<0.001). Differences in prevalence and seventy of enamel fluorosis between both groups are tentatively attributed lo a different pattern of tap water and tea consumption at pre-school ages. Suggestions are advanced to minimize the undesirable prevalence and severity of enamel fluorosis.  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