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   2275篇
  免费   248篇
  国内免费   16篇
耳鼻咽喉   44篇
儿科学   85篇
妇产科学   72篇
基础医学   374篇
口腔科学   25篇
临床医学   295篇
内科学   470篇
皮肤病学   67篇
神经病学   118篇
特种医学   110篇
外科学   291篇
综合类   64篇
一般理论   3篇
预防医学   262篇
眼科学   18篇
药学   169篇
中国医学   1篇
肿瘤学   71篇
  2022年   20篇
  2021年   25篇
  2020年   28篇
  2019年   43篇
  2018年   37篇
  2017年   36篇
  2016年   37篇
  2015年   32篇
  2014年   56篇
  2013年   86篇
  2012年   114篇
  2011年   108篇
  2010年   59篇
  2009年   52篇
  2008年   87篇
  2007年   103篇
  2006年   91篇
  2005年   87篇
  2004年   74篇
  2003年   81篇
  2002年   70篇
  2001年   67篇
  2000年   68篇
  1999年   70篇
  1998年   30篇
  1997年   28篇
  1994年   20篇
  1993年   21篇
  1992年   53篇
  1991年   38篇
  1990年   55篇
  1989年   51篇
  1988年   50篇
  1987年   51篇
  1986年   46篇
  1985年   53篇
  1984年   32篇
  1983年   32篇
  1982年   28篇
  1981年   27篇
  1980年   20篇
  1979年   44篇
  1978年   22篇
  1976年   24篇
  1975年   25篇
  1974年   28篇
  1973年   31篇
  1971年   20篇
  1970年   20篇
  1968年   18篇
排序方式: 共有2539条查询结果,搜索用时 0 毫秒
991.

Background  

Respiratory alarm monitoring and rapid response team alerts on hospital general floors are based on detection of simple numeric threshold breaches. Although some uncontrolled observation trials in select patient populations have been encouraging, randomized controlled trials suggest that this simplistic approach may not reduce the unexpected death rate in this complex environment. The purpose of this review is to examine the history and scientific basis for threshold alarms and to compare thresholds with the actual pathophysiologic patterns of evolving death which must be timely detected.  相似文献   
992.
993.

Purpose

Wound care for partial-thickness burns should alleviate pain, decrease hospital length of stay, and be readily applied to a variety of wounds. The effectiveness of Biobrane (UDL Laboratories, Rockford, IL) is compared with that of Beta Glucan Collagen (BGC; Brennan Medical, St. Paul, MN) in a retrospective cohort study.

Methods

A retrospective chart review of all children treated at a tertiary care pediatric hospital between 2003 and 2009 identified patients with partial-thickness burns treated with Biobrane. These patients were compared with historical controls treated with BGC.

Results

A total of 235 children between the ages of 4 weeks and 18 years with an average of 6.0% body surface area partial-thickness burns were treated with Biobrane. In a multivariate statistical analysis, patients treated with Biobrane healed significantly faster than those treated with BGC (Biobrane vs BGC: median, 9 vs 13 days; P = .019; hazard ratio, 1.68). In addition, patients who required inpatient treatment trended toward having shorter length of hospital stay in the Biobrane group (2.6 vs 4.1 days, P = .079).

Conclusion

Partial-thickness burn care consists of early debridement and application of a burn wound dressing. Biobrane dressings result in faster healing compared with BGC and may decrease hospital length of stay for patients requiring inpatient admission.  相似文献   
994.
995.
Utilization of livers from expanded criteria donors (ECD) is one strategy to overcome the severe organ shortage. The decision to utilize an ECD liver is complex and fraught with uncertainty for both providers and patients. We assessed patients’ willingness to accept ECD liver transplantation (LTx) and acceptable 1‐year mortality risk. One hundred eight patients listed for LTx were asked to rate their willingness to accept ECD LTx and the associated 1‐year mortality risk they were willing to accept. Also, patients completed the SF‐36v2 and sociodemographic and health information was gathered from their medical records. Patients reported significantly higher willingness to accept standard criteria donor (SCD) versus ECD LTx (t = 13.8, p < 0.001), with more than one‐third of patients reporting low willingness to accept ECD LTx. Relative to our center's 10% SCD LTx 1‐year mortality rate, most patients (71%) were willing to accept moderately or substantially higher 1‐year mortality risk for ECD LTx. In multivariable analyses, higher lab MELD score and white race were significant independent predictors of both ECD willingness and ECD increased mortality risk acceptability. Findings highlight the importance of assessing patients’ willingness to pursue ECD LTx and the relative mortality risks they are willing to accept.  相似文献   
996.
997.

Aim  

To describe the development of a dementia research registry, outlining the conceptual, practical and ethical challenges, and to report initial experiences of recruiting people with dementia to it from primary and secondary care.  相似文献   
998.
999.
目的探讨新登记涂阳肺结核病例的转归,评价肺结核传染源控制效果。方法对613例新发涂阳肺结核病例的资料进行队列分析。结果新登记涂阳肺结核,以青壮年多发,以待业、家务和务农为主,集中于农猎区和林区,营养状况偏低。治愈率呈逐年上升趋势,严格执行全程督导化疗。结论严格执行DOTS的技术规范是控制肺结核传染源的主要措施。  相似文献   
1000.
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