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   727998篇
  免费   52405篇
  国内免费   1326篇
耳鼻咽喉   9474篇
儿科学   23942篇
妇产科学   18078篇
基础医学   113546篇
口腔科学   20444篇
临床医学   66571篇
内科学   138096篇
皮肤病学   16383篇
神经病学   52036篇
特种医学   26473篇
外国民族医学   76篇
外科学   108150篇
综合类   15398篇
现状与发展   2篇
一般理论   165篇
预防医学   54072篇
眼科学   16790篇
药学   55453篇
  3篇
中国医学   2365篇
肿瘤学   44212篇
  2019年   5793篇
  2018年   8314篇
  2017年   6417篇
  2016年   7127篇
  2015年   7911篇
  2014年   10787篇
  2013年   16254篇
  2012年   21689篇
  2011年   22658篇
  2010年   13347篇
  2009年   12561篇
  2008年   21061篇
  2007年   22576篇
  2006年   22935篇
  2005年   21405篇
  2004年   20985篇
  2003年   19893篇
  2002年   19272篇
  2001年   37092篇
  2000年   37691篇
  1999年   31014篇
  1998年   8161篇
  1997年   6898篇
  1996年   7232篇
  1995年   6867篇
  1994年   6308篇
  1993年   5826篇
  1992年   23518篇
  1991年   23452篇
  1990年   22819篇
  1989年   22594篇
  1988年   20521篇
  1987年   19923篇
  1986年   18902篇
  1985年   17756篇
  1984年   13038篇
  1983年   11057篇
  1982年   6132篇
  1979年   11837篇
  1978年   8306篇
  1977年   7014篇
  1976年   6791篇
  1975年   7436篇
  1974年   8709篇
  1973年   8342篇
  1972年   7825篇
  1971年   7284篇
  1970年   7029篇
  1969年   6464篇
  1968年   5895篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
FGFR–TACC, found in different tumor types, is characterized by the fusion of a member of fibroblast grown factor receptor (FGFR) tyrosine kinase (TK) family to a member of the transforming acidic coiled-coil (TACC) proteins. Because chromosome numerical alterations, hallmarks of FGFR–TACC fusions are present in many hematological disorders and there are no data on the prevalence, we studied a series of patients with acute myeloid leukemia and myelodysplastic syndrome who presented numerical alterations using cytogenetic traditional analysis. None of the analyzed samples showed FGFR3–TACC3 gene fusion, so screening for this mutation at diagnosis is not recommended.  相似文献   
103.
104.
105.
106.
Traditionally, major complications and unanticipated admission/readmission rates were used to assess outcome after day surgery. However, in view of the relative absence of major complications the quality of recovery (QOR) should be considered one of the principal endpoints after day surgery. In our study, the level of QOR is defined by a combination of the Global Surgical Recovery (GSR) Index and the Quality of Life (QOL).The aim of this study was to analyze prevalence and predictors of QOR after day surgery on the fourth postoperative day.Elective patients scheduled for day surgery from November 2008 to April 2010 were enrolled in a prospective cohort study. Outcome parameters were measured by using questionnaire packages at 2 time points: 1 week preoperatively and 4 days postoperatively. Primary outcome parameter is the QOR and is defined as good if the GSR index >80% as well as the postoperative QOL is unchanged or improved as compared with baseline. QOR is defined as poor if both the GSR index ≤80% and if the postoperative QOL is decreased as compared with baseline. QOR is defined as intermediate in all other cases. Three logistic regression analyses were performed to determine predictors for poor QOR after day surgery.A total of 1118 patients were included. A good QOR was noted in 17.3% of patients, an intermediate QOR in 34.8%, and a poor QOR in 47.8% 4 days after day surgery. The best predictor for poor QOR after day surgery was type of surgery. Other predictors were younger age, work status, and longer duration of surgery. A history of previous surgery, expected pain (by the patient) and high long-term surgical fear were significant predictors of poor QOR in only 1 of 3 prediction models.The QOR at home 4 days after day surgery was poor in the majority of patients and showed a significant procedure-specific variation. Patients at risk for poor QOR can be identified during the preoperative period based on type of surgery, age, work status, and the duration of the surgery.  相似文献   
107.
108.
109.
110.
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