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   1909篇
  免费   339篇
  国内免费   85篇
耳鼻咽喉   23篇
儿科学   49篇
妇产科学   10篇
基础医学   184篇
口腔科学   36篇
临床医学   381篇
内科学   96篇
皮肤病学   4篇
神经病学   57篇
特种医学   35篇
外科学   91篇
综合类   598篇
一般理论   1篇
预防医学   301篇
眼科学   13篇
药学   96篇
  9篇
中国医学   325篇
肿瘤学   24篇
  2024年   5篇
  2023年   32篇
  2022年   51篇
  2021年   99篇
  2020年   96篇
  2019年   85篇
  2018年   79篇
  2017年   85篇
  2016年   92篇
  2015年   87篇
  2014年   162篇
  2013年   390篇
  2012年   136篇
  2011年   141篇
  2010年   99篇
  2009年   83篇
  2008年   80篇
  2007年   85篇
  2006年   87篇
  2005年   43篇
  2004年   56篇
  2003年   51篇
  2002年   32篇
  2001年   28篇
  2000年   43篇
  1999年   27篇
  1998年   20篇
  1997年   12篇
  1996年   4篇
  1995年   9篇
  1994年   6篇
  1993年   3篇
  1992年   3篇
  1991年   5篇
  1990年   4篇
  1989年   1篇
  1988年   1篇
  1987年   1篇
  1985年   2篇
  1984年   1篇
  1983年   1篇
  1982年   2篇
  1979年   1篇
  1978年   2篇
  1977年   1篇
排序方式: 共有2333条查询结果,搜索用时 15 毫秒
991.
992.
As opioid-related overdose deaths increase across the nation, the need for opioid and naloxone education is of the utmost importance. The metropolitan Chicago area is one of the hardest hit regions regarding opioid use and overdoses. This report focuses on advanced practice nurses’ efforts to provide opioid education and naloxone training to a network of primary care clinics in underserved communities surrounding downtown Chicago. Postsurvey data revealed positive results, showing an increased awareness regarding the opioid crisis and naloxone administration. Utilizing advanced practice nursing skillsets poses as an optimal opportunity to educate interdisciplinary teams, which can positively influence patient outcomes.  相似文献   
993.
通过对《医林纂要探源》药性篇的文献研究,对其中药研究学术特色进行了系统整理,认为主要有以下几点:一是药物类分的创新;二是对一些药物基原性状的记载较为详细;三是订正一些前人对药名的错误认识,提出新的药性观点;四是注重中药功用研究;五是重视以谷养生;六是用药体现以仁为本思想。本书在药性学术领域特色鲜明,充分展现了新安医学本草学术研究的突出成就。  相似文献   
994.
995.
自身免疫性甲状腺炎是最常见的甲状腺疾病之一,近年来患病率不断上升。现代医学尚无针对其病因的治疗方法,以对症治疗为主,疗效有限,并有一定的副作用。中医药通过多靶点、协同增效,改善各脏腑功能,调节自身免疫以降低甲状腺抗体滴度水平、减轻病理损伤来控制病情进展。同时可以纠正异常的甲功,有效改善患者的症状,提高生活质量。深入研究自身免疫性甲状腺炎的中医药治疗具有重要的临床价值及社会意义。刘铜华教授在长期的临床和科研工作中对于本病有着深刻的理解:认为本病多起于情志内伤,以气郁为先导,痰凝、瘀阻贯穿疾病始终,气、痰、瘀壅滞颈前而为病。治以理气解郁、化痰祛瘀、消瘿散结。同时防治结合,既病防变,兼顾正气。在此基础上创立了疗效确切的经验方甲炎康泰方。传承疗效确切的临床经验和学术思想并不断创新,能够有力推动中医药的发展。本文对刘铜华教授治疗自身免疫性甲状腺炎的临床经验进行论述总结。  相似文献   
996.

Objectives/Hypothesis:

The hindex is an accurate and reliable indicator of scholarly productivity that takes into account relevance, significance, and influence of research contributions. As such, it is an effective, objective bibliometric that can be used to evaluate academic otolaryngologists for decisions regarding appointment and advancement. In this study, we evaluate the impact of NIH funding on scholarly productivity in otolaryngology.

Study Design:

Analysis of bibliometric data of academic otolaryngologists.

Methods:

Funding data for the 20 otolaryngology departments with the largest aggregate total of NIH grants for the fiscal years (FY) 2011 and 2012 was obtained using the National Institutes of Health Research Portfolio Online Reporting Tools Expenditures and Reports (RePORTER) Database. Hindices were calculated using the Scopus online database, and then compared to funding data at both the departmental and individual level.

Results:

Faculty members in otolaryngology departments who received NIH funding had significantly greater research productivity and impact, as measured by the hindex, than their nonfunded peers. Hindices increased with greater NIH funding levels, and investigators with MD degrees tended to have higher mean NIH funding levels than those with PhDs. While there was no correlation between average hindex and NIH funding totals at the level of departments, there was greater correlation upon examination of NIH funding levels of individual investigators.

Conclusions:

The hindex has a strong relationship with, and may be predictive of, grant awards of NIH‐funded faculty members in otolaryngology departments. This bibliometric may be useful in decisions regarding appointment and advancement of faculty members within academic otolaryngology departments. Laryngoscope, 2013  相似文献   
997.
干细胞抗衰老的理论研究与进展   总被引:1,自引:0,他引:1  
背景:衰老是生物体必然的发展趋势,是一种复杂多变的过程。在整个生命过程中,机体会受到外界环境中各种物质、能量、信息的影响和作用,且组织和器官也会不可避免的发生损伤和功能衰退。随着医疗技术和生活水平提高,老龄化人1:3数量增加,俐随衰老,人体器官生理功能发生病变,如高血压、冠状动脉粥样硬化等疾病增加。延缓衰老可能减少这些疾病的发生,从整体上提高机体功能状态,从而提高机体的生命质量。研究抗衰老是当今社会的热点课题。目的:以衰老的学说研究、评定为引子,对目前千细胞与抗衰老的关系进行综述。方法:应用计算机检索PubMed 1865年1月至2012年4月期间的相关文章,检索词为“stem cells,Progenitor cells, totipotent stem cell, muitipotent stem cell, anti-aging”,并限定文章语言种类为English。同时计算机检索万方数据库2012年4月期间的相关文章78篇,检索词为“干细胞,抗衰老”,并限定文章语言种类为中文。此外还手工查阅相关专著数部。共检索到文献152篇,最终纳入53篇。结果与结论:干细胞具有自我更新的能力,可以提高机体抗自由基能力,能分泌一些细胞因子,如胰岛素生长因子1、超氧化物歧化酶等提升衰老机体各组织功能,骨髓间充质干细胞、胚胎干细胞、脐血干细胞、生殖干细胞已经在动物实验中被证实有抗衰老作用,脂肪来源干细胞已经在临床抗衰老中应用。  相似文献   
998.
Aim: Competency standards support a range of professional activities, including the accreditation of university courses educating health professionals. Reviewing these standards is essential to ensure universities continue to produce well‐equipped graduates, who are able to meet the challenge of changing workforce requirements. This paper has two aims: (a) to provide an overview of the methodological approaches used for compilation and review of the Competency Standards for Dietitians and (b) to evaluate the Dietitians Association of Australia's Competency Standards and capture emerging and contemporary dietetic practice. Methods: A literature review of the methods used to develop competency standards for dietitians in Australia, including entry‐level, Advanced level and Dieticians Association of Australia Fellow competencies and other specific areas of competency, such as public health nutrition and nutrition education, is outlined and compared with other allied health professions. The mixed methods methodology used in the most recent review is described in more detail. Results: The history of Dietetic Competency Standards development and review in Australia is compared with Dietetic Competency Standards internationally and within other health professions in Australia. The political context in which these standards have been developed in Australia and which has determined their format is also discussed. The results of the most recent competency standards review are reported to highlight emerging practice in Australia. Conclusion: The mixed methods approach used in this review provides rich data about contemporary dietetic practice. Our view supports a planned review of all competency standards to ensure practice informs education and credentialing, and we recommend the Dietitians Association of Australia consider this in the future.  相似文献   
999.
1000.
Decreased public funding, a competitive healthcare market, and higher patient care costs have been blamed for the present financial challenges that confront academic health centers. The authors examined the costs associated with graduate medical education, particularly, indirect medical education expenses in the operating room. The results indicate that it is more costly for teaching hospitals to provide surgical care to patients in the operating room. The academic health center's indirect graduate medical expenses only covered a portion of the increased costs. If the missions of academic health centers are perceived as a public good, policy makers must design a system that more appropriately compensates academic health centers for the additional costs associated with surgical procedures in graduate medical education.  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