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   15471篇
  免费   3323篇
  国内免费   60篇
耳鼻咽喉   247篇
儿科学   541篇
妇产科学   482篇
基础医学   1340篇
口腔科学   103篇
临床医学   2387篇
内科学   3503篇
皮肤病学   527篇
神经病学   1697篇
特种医学   363篇
外科学   2955篇
综合类   88篇
一般理论   15篇
预防医学   2141篇
眼科学   595篇
药学   771篇
中国医学   3篇
肿瘤学   1096篇
  2024年   104篇
  2023年   812篇
  2022年   244篇
  2021年   576篇
  2020年   625篇
  2019年   515篇
  2018年   1017篇
  2017年   1026篇
  2016年   965篇
  2015年   871篇
  2014年   1170篇
  2013年   1252篇
  2012年   1101篇
  2011年   1091篇
  2010年   883篇
  2009年   945篇
  2008年   823篇
  2007年   718篇
  2006年   685篇
  2005年   549篇
  2004年   500篇
  2003年   428篇
  2002年   411篇
  2001年   172篇
  2000年   91篇
  1999年   127篇
  1998年   145篇
  1997年   132篇
  1996年   108篇
  1995年   95篇
  1994年   71篇
  1993年   70篇
  1992年   76篇
  1991年   65篇
  1990年   57篇
  1989年   45篇
  1988年   47篇
  1987年   27篇
  1986年   29篇
  1985年   23篇
  1984年   24篇
  1983年   17篇
  1982年   19篇
  1981年   15篇
  1980年   11篇
  1979年   7篇
  1978年   8篇
  1977年   8篇
  1975年   8篇
  1972年   6篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Patient navigation is a strategy for overcoming barriers to reduce disparities and to improve access and outcomes. The aim of this umbrella review was to identify, critically appraise, synthesize, and present the best available evidence to inform policy and planning regarding patient navigation across the cancer continuum. Systematic reviews examining navigation in cancer care were identified in the Cochrane Central Register of Controlled Trials (CENTRAL), PubMed, Embase, Cumulative Index of Nursing and Allied Health (CINAHL), Epistemonikos, and Prospective Register of Systematic Reviews (PROSPERO) databases and in the gray literature from January 1, 2012, to April 19, 2022. Data were screened, extracted, and appraised independently by two authors. The JBI Critical Appraisal Checklist for Systematic Review and Research Syntheses was used for quality appraisal. Emerging literature up to May 25, 2022, was also explored to capture primary research published beyond the coverage of included systematic reviews. Of the 2062 unique records identified, 61 systematic reviews were included. Fifty-four reviews were quantitative or mixed-methods reviews, reporting on the effectiveness of cancer patient navigation, including 12 reviews reporting costs or cost-effectiveness outcomes. Seven qualitative reviews explored navigation needs, barriers, and experiences. In addition, 53 primary studies published since 2021 were included. Patient navigation is effective in improving participation in cancer screening and reducing the time from screening to diagnosis and from diagnosis to treatment initiation. Emerging evidence suggests that patient navigation improves quality of life and patient satisfaction with care in the survivorship phase and reduces hospital readmission in the active treatment and survivorship care phases. Palliative care data were extremely limited. Economic evaluations from the United States suggest the potential cost-effectiveness of navigation in screening programs.  相似文献   
2.
3.
4.
5.
6.
7.

Objectives

The current study investigated the effects of two exercise interventions on cognitive function amongst breast cancer survivors.

Design

Pilot randomised-controlled trial.

Methods

Seventeen female cancer survivors (mean: 62.9 ± 7.8 years) were randomised into three groups: high-intensity interval training (HIIT, n = 6); moderate-intensity continuous training (MOD, n = 5); or wait-list control (CON, n = 6). The HIIT and MOD groups exercised on a cycle ergometer 3 days/week for 12-weeks. Primary outcomes were cognitive function assessments utilising CogState. Secondary outcomes were resting middle cerebral artery blood flow velocity, cerebrovascular reactivity and aerobic fitness (VO2peak). Data were analysed with General Linear Mixed Models and Cohen’s d effect sizes were calculated.

Results

All 17 participants who were randomised were available for follow-up analysis and adherence was similar for HIIT and MOD (78.7 ± 13.2% vs 79.4 ± 12.0%; p = 0.93). Although there were no significant differences in the cognitive and cerebrovascular outcomes, HIIT produced moderate to large positive effects in comparison to MOD and CON for outcomes including episodic memory, working memory, executive function, cerebral blood flow and cerebrovascular reactivity. HIIT significantly increased VO2peak by 19.3% (d = 1.28) and MOD had a non-significant 5.6% (d = 0.72) increase, compared to CON which had a 2.6% decrease.

Conclusions

This study provides preliminary evidence that HIIT may be an effective exercise intervention to improve cognitive performance, cerebrovascular function and aerobic fitness in breast cancer survivors. Considering the sample size is small, these results should be confirmed through larger clinical trials.  相似文献   
8.
9.
10.
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