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   709932篇
  免费   48942篇
  国内免费   1303篇
耳鼻咽喉   9206篇
儿科学   23391篇
妇产科学   17705篇
基础医学   111303篇
口腔科学   20078篇
临床医学   64098篇
内科学   134864篇
皮肤病学   16217篇
神经病学   49742篇
特种医学   25837篇
外国民族医学   76篇
外科学   104847篇
综合类   14843篇
现状与发展   2篇
一般理论   161篇
预防医学   51634篇
眼科学   16478篇
药学   54231篇
  3篇
中国医学   2360篇
肿瘤学   43101篇
  2019年   5453篇
  2018年   7887篇
  2017年   6123篇
  2016年   6837篇
  2015年   7592篇
  2014年   10315篇
  2013年   15481篇
  2012年   20599篇
  2011年   21599篇
  2010年   12850篇
  2009年   12010篇
  2008年   20120篇
  2007年   21626篇
  2006年   22022篇
  2005年   20557篇
  2004年   20170篇
  2003年   19105篇
  2002年   18660篇
  2001年   36434篇
  2000年   36997篇
  1999年   30479篇
  1998年   7931篇
  1997年   6696篇
  1996年   6998篇
  1995年   6666篇
  1994年   6134篇
  1993年   5623篇
  1992年   23050篇
  1991年   22995篇
  1990年   22370篇
  1989年   22142篇
  1988年   20105篇
  1987年   19479篇
  1986年   18515篇
  1985年   17365篇
  1984年   12737篇
  1983年   10779篇
  1982年   5954篇
  1979年   11565篇
  1978年   8167篇
  1977年   6859篇
  1976年   6623篇
  1975年   7297篇
  1974年   8560篇
  1973年   8172篇
  1972年   7701篇
  1971年   7181篇
  1970年   6948篇
  1969年   6405篇
  1968年   5879篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
Maternal and Child Health Journal - Background Prenatal substance use screening is recommended. The 4 P’s Plus screener includes questions on perceived problematic substance use in parents...  相似文献   
52.

Introduction The focus in clinical pharmacy practice is and has for the last 30–35 years been on changing the role of pharmacy staff into service orientation and patient counselling. One way of doing this is by involving staff in change process and as a researcher to take part in the change process by establishing partnerships with staff. On the background of the authors’ widespread action research (AR)-based experiences, recommendations and comments for how to conduct an AR-study is described, and one of their AR-based studies illustrate the methodology and the research methods used. Methodology AR is defined as an approach to research which is based on a problem-solving relationship between researchers and clients, which aims at both solving a problem and at collaboratively generating new knowledge. Research questions relevant in AR-studies are: what was the working process in this change oriented study? What learning and/or changes took place? What challenges/pitfalls had to be overcome? What were the influence/consequences for the involved parts? When to use If you want to implement new services and want to involve staff and others in the process, an AR methodology is very suitable. The basic advantages of doing AR-based studies are grounded in their participatory and democratic basis and their starting point in problems experienced in practice. Limitations Some of the limitations in AR-studies are that neither of the participants in a project steering group are the only ones to decide. Furthermore, the collective process makes the decision-making procedures relatively complex.

  相似文献   
53.
54.
55.
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   
56.
57.
58.
59.
60.
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