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   4806篇
  免费   467篇
  国内免费   10篇
耳鼻咽喉   23篇
儿科学   95篇
妇产科学   89篇
基础医学   806篇
口腔科学   30篇
临床医学   540篇
内科学   1170篇
皮肤病学   203篇
神经病学   489篇
特种医学   86篇
外科学   467篇
综合类   72篇
一般理论   2篇
预防医学   597篇
眼科学   44篇
药学   321篇
中国医学   3篇
肿瘤学   246篇
  2023年   27篇
  2021年   60篇
  2020年   54篇
  2019年   63篇
  2018年   88篇
  2017年   70篇
  2016年   94篇
  2015年   96篇
  2014年   116篇
  2013年   172篇
  2012年   303篇
  2011年   323篇
  2010年   138篇
  2009年   122篇
  2008年   265篇
  2007年   239篇
  2006年   233篇
  2005年   224篇
  2004年   232篇
  2003年   200篇
  2002年   211篇
  2001年   190篇
  2000年   144篇
  1999年   155篇
  1998年   75篇
  1997年   31篇
  1996年   43篇
  1995年   50篇
  1994年   44篇
  1993年   33篇
  1992年   88篇
  1991年   74篇
  1990年   72篇
  1989年   91篇
  1988年   73篇
  1987年   70篇
  1986年   65篇
  1985年   56篇
  1984年   42篇
  1983年   40篇
  1979年   45篇
  1978年   27篇
  1977年   27篇
  1976年   27篇
  1973年   34篇
  1972年   31篇
  1971年   37篇
  1970年   26篇
  1967年   25篇
  1966年   27篇
排序方式: 共有5283条查询结果,搜索用时 62 毫秒
1.
2.
3.
4.
5.
6.
7.
8.
9.

Background

Policy makers are considering changes to the Supplemental Nutrition Assistance Program (SNAP). Proposed changes include financially incentivizing the purchase of healthier foods and prohibiting the use of funds for purchasing foods high in added sugars. SNAP participant perspectives may be useful in understanding the consequences of these proposed changes.

Objective

To determine whether food restrictions and/or incentives are acceptable to food benefit program participants.

Design

Data were collected as part of an experimental trial in which lower-income adults were randomly assigned to one of four financial food benefit conditions: (1) Incentive: 30% financial incentive on eligible fruits and vegetables purchased using food benefits; (2) Restriction: not allowed to buy sugar-sweetened beverages, sweet baked goods, or candies with food benefits; (3) Incentive plus Restriction; or (4) Control: no incentive/restriction. Participants completed closed- and open-ended questions about their perceptions on completion of the 12-week program.

Participants/setting

Adults eligible or nearly eligible for SNAP were recruited between 2013 and 2015 by means of events or flyers in the Minneapolis/St Paul, MN, metropolitan area. Of the 279 individuals who completed baseline measures, 265 completed follow-up measures and are included in these analyses.

Statistical analysis

χ2 analyses were conducted to assess differences in program satisfaction. Responses to open-ended questions were qualitatively analyzed using principles of content analysis.

Results

There were no statistically significant or meaningful differences between experimental groups in satisfaction with the program elements evaluated in the study. Most participants in all conditions found the food program helpful in buying nutritious foods (94.1% to 98.5%) and in buying the kinds of foods they wanted (85.9% to 95.6%). Qualitative data suggested that most were supportive of restrictions, although a few were dissatisfied. Participants were uniformly supportive of incentives.

Conclusions

Findings suggest a food benefit program that includes incentives for purchasing fruits and vegetables and/or restrictions on the use of program funds for purchasing foods high in added sugars appears to be acceptable to most participants.  相似文献   
10.

Introduction

Timely referral of patients following asystolic death to an organ procurement organization (OPO) may increase tissue donation rates. Lack of education of health care providers and nonphysicians (admitting department) about timely referral to the OPO following asystolic death may adversely affect tissue donation rates. We hypothesized that using an in-house donation coordinator for provider education and changing the responsibility for calling the OPO from the admitting department to the licensed independent practitioner (LIP) declaring death would increase timely referral and tissue donation rates.

Methods

An education program was developed in 2005 by a newly hired in-house coordinator to highlight the importance of tissue donation. In addition, to improve timely referrals to the OPO after death, the instructions accompanying the working copy of the death certificate were altered to require the patient's LIP to call the OPO within 1 hour of death (early 2007). Rates for both timely referrals and tissue donors were modeled by a Poisson regression model with a log link function.

Results

Timely referral rates rose from 48% before the interventions to 72% after the intervention (P < .0001). The number of tissue donors per number of referrals also increased significantly (P = .025) over that period.

Conclusions

An in-house donation coordinator initiated education program and LIP referral rather than referral by other parties following asystolic death results in higher tissue donation rates.  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