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   18876篇
  免费   1185篇
  国内免费   200篇
耳鼻咽喉   240篇
儿科学   640篇
妇产科学   454篇
基础医学   2514篇
口腔科学   218篇
临床医学   1505篇
内科学   3522篇
皮肤病学   332篇
神经病学   1375篇
特种医学   603篇
外国民族医学   1篇
外科学   2398篇
综合类   484篇
一般理论   23篇
预防医学   2976篇
眼科学   499篇
药学   1097篇
  2篇
中国医学   136篇
肿瘤学   1242篇
  2024年   29篇
  2023年   184篇
  2022年   352篇
  2021年   613篇
  2020年   280篇
  2019年   518篇
  2018年   624篇
  2017年   437篇
  2016年   464篇
  2015年   543篇
  2014年   721篇
  2013年   1020篇
  2012年   1466篇
  2011年   1530篇
  2010年   905篇
  2009年   717篇
  2008年   1098篇
  2007年   1191篇
  2006年   1119篇
  2005年   935篇
  2004年   888篇
  2003年   828篇
  2002年   713篇
  2001年   355篇
  2000年   299篇
  1999年   251篇
  1998年   102篇
  1997年   99篇
  1996年   73篇
  1995年   69篇
  1994年   69篇
  1993年   45篇
  1992年   158篇
  1991年   142篇
  1990年   162篇
  1989年   174篇
  1988年   147篇
  1987年   141篇
  1986年   118篇
  1985年   105篇
  1984年   74篇
  1983年   58篇
  1982年   26篇
  1981年   30篇
  1980年   24篇
  1979年   45篇
  1975年   29篇
  1974年   21篇
  1973年   23篇
  1972年   22篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.

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   
6.
目的探讨脉冲微波治疗前列腺炎的效果。方法收治前列腺炎病人532例。用南京亿高ECO—100型电脑微波前列腺炎治疗仪,经肛门途径发射脉冲微波,前列腺部位温度控制在41℃~42℃,每次持续45~60min,共七次。以显效、有效为判断疗效标准。结果17~25岁组显效47.93%,有效52.07%,26~45岁组显效52.06%,有效47.94%,两组有效率100%。结论脉冲微波经肛门途径治疗前列腺炎效果明显,有推广价值。  相似文献   
7.
Background:  Previous studies into leisure have employed methodologies that may understate the significance of experiential components. This exploratory study investigated the leisure experiences of retired Australians over 65 years of age.
Methods:  Five semistructured interviews were used to explore the leisure experience of older people from metropolitan Adelaide. Data were coded and analysed thematically.
Results:  Relaxation and engrossment emerged as commonly expressed experiences, yet were found to emerge as a result of engagement in occupations predefined as leisure. Experiences of freedom from both necessary duties and a sense of obligation were discussed as potential determinants of leisure consciousness.
Practice implications:  This study highlights a need for therapists to actively access clients' subjective leisure experiences to enable engagement in personally meaningful leisure occupations.  相似文献   
8.
We prospectively enrolled 160 consecutive patients with inversion trauma of the ankle in a diagnostic protocol that included physical examination within 2 days and at 5 days after trauma, arthrography, stress radiography, and ultrasonography. 135 patients had pathological lateral ligament laxity on the later physical examination or lateral ligament rupture diagnosed on arthrography and they were operated on. 122 of these patients had ligament ruptures.

At clinical follow-up after a minimum of half a year, all of the patients who were not operated on had stable joints without signs of previous ligament ruptures.

Delayed physical examination at 5 days after the injury led to the highest overall sensitivity (96%) and specificity (84%) for the detection of a ligament rupture. Additional diagnostic procedures, at a considerable cost, yielded little additional information.  相似文献   
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