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   20886篇
  免费   1358篇
  国内免费   266篇
耳鼻咽喉   277篇
儿科学   736篇
妇产科学   468篇
基础医学   2686篇
口腔科学   273篇
临床医学   1743篇
内科学   3794篇
皮肤病学   347篇
神经病学   1386篇
特种医学   683篇
外国民族医学   1篇
外科学   2550篇
综合类   957篇
一般理论   23篇
预防医学   3231篇
眼科学   499篇
药学   1249篇
  4篇
中国医学   262篇
肿瘤学   1341篇
  2024年   33篇
  2023年   199篇
  2022年   396篇
  2021年   677篇
  2020年   337篇
  2019年   547篇
  2018年   659篇
  2017年   492篇
  2016年   502篇
  2015年   605篇
  2014年   827篇
  2013年   1153篇
  2012年   1637篇
  2011年   1704篇
  2010年   1095篇
  2009年   868篇
  2008年   1273篇
  2007年   1344篇
  2006年   1206篇
  2005年   1013篇
  2004年   947篇
  2003年   887篇
  2002年   735篇
  2001年   391篇
  2000年   315篇
  1999年   267篇
  1998年   106篇
  1997年   108篇
  1996年   82篇
  1995年   75篇
  1994年   74篇
  1993年   47篇
  1992年   156篇
  1991年   140篇
  1990年   164篇
  1989年   182篇
  1988年   151篇
  1987年   158篇
  1986年   123篇
  1985年   115篇
  1984年   86篇
  1983年   61篇
  1982年   30篇
  1981年   38篇
  1980年   33篇
  1979年   56篇
  1975年   32篇
  1974年   27篇
  1973年   24篇
  1972年   24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.
6.

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   
7.
While once considered as incurable systemic disease, treatment options for liver metastases have increased over the last 30 years and safety has improved dramatically, such that for a selected group of patients the hope of cure can now be offered with radical treatment, and low morbidity interventions can be offered which prolong survival, even in patients with more widely disseminated disease. Advances have been made in selection and surgical technique for liver resection and several adjuncts to resection now exist in the form of portal vein embolization, thermal ablation and targeted drug or radiotherapy delivery options. A natural consequence of these developments has been the delivery of services within fewer specialist units, with the result that later complications of therapy may present to local hospitals, rather than directly to the specialist centres. This article will describe the current common liver-directed therapies and outline the presentation and management of their complications.  相似文献   
8.
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   
9.
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   
10.
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   
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