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   8372篇
  免费   720篇
  国内免费   173篇
耳鼻咽喉   52篇
儿科学   174篇
妇产科学   72篇
基础医学   955篇
口腔科学   224篇
临床医学   1219篇
内科学   1437篇
皮肤病学   83篇
神经病学   659篇
特种医学   254篇
外科学   650篇
综合类   751篇
一般理论   10篇
预防医学   1476篇
眼科学   96篇
药学   610篇
  3篇
中国医学   294篇
肿瘤学   246篇
  2024年   8篇
  2023年   232篇
  2022年   209篇
  2021年   437篇
  2020年   351篇
  2019年   386篇
  2018年   344篇
  2017年   331篇
  2016年   316篇
  2015年   338篇
  2014年   511篇
  2013年   793篇
  2012年   464篇
  2011年   486篇
  2010年   413篇
  2009年   359篇
  2008年   400篇
  2007年   359篇
  2006年   292篇
  2005年   257篇
  2004年   255篇
  2003年   221篇
  2002年   165篇
  2001年   168篇
  2000年   124篇
  1999年   107篇
  1998年   93篇
  1997年   93篇
  1996年   82篇
  1995年   76篇
  1994年   69篇
  1993年   41篇
  1992年   58篇
  1991年   45篇
  1990年   43篇
  1989年   45篇
  1988年   45篇
  1987年   32篇
  1986年   33篇
  1985年   28篇
  1984年   29篇
  1983年   23篇
  1982年   14篇
  1981年   16篇
  1980年   16篇
  1979年   11篇
  1978年   11篇
  1976年   11篇
  1975年   5篇
  1974年   6篇
排序方式: 共有9265条查询结果,搜索用时 15 毫秒
1.
The Earth’s mean surface temperature is already approximately 1.1°C higher than pre-industrial levels. Exceeding a mean 1.5°C rise by 2050 will make global adaptation to the consequences of climate change less possible. To protect public health, anaesthesia providers need to reduce the contribution their practice makes to global warming. We convened a Working Group of 45 anaesthesia providers with a recognised interest in sustainability, and used a three-stage modified Delphi consensus process to agree on principles of environmentally sustainable anaesthesia that are achievable worldwide. The Working Group agreed on the following three important underlying statements: patient safety should not be compromised by sustainable anaesthetic practices; high-, middle- and low-income countries should support each other appropriately in delivering sustainable healthcare (including anaesthesia); and healthcare systems should be mandated to reduce their contribution to global warming. We set out seven fundamental principles to guide anaesthesia providers in the move to environmentally sustainable practice, including: choice of medications and equipment; minimising waste and overuse of resources; and addressing environmental sustainability in anaesthetists’ education, research, quality improvement and local healthcare leadership activities. These changes are achievable with minimal material resource and financial investment, and should undergo re-evaluation and updates as better evidence is published. This paper discusses each principle individually, and directs readers towards further important references.  相似文献   
2.
Climate change education in advanced practice registered nursing curricula prepares nurse practitioners to respond to the health effects of climate change. Knowledge of the relationship between human and environmental health is essential for nurse practitioners to identify, teach, and respond to the health effects of climate change in clinical and community settings. This article describes a webinar hosted by the Sarah P. Duke Gardens in partnership with the Duke University School of Nursing. Our webinar provided an opportunity for attendees to understand how gardening can mitigate climate change, the important relationship between human and environmental health, and nurses’ role in climate crisis.  相似文献   
3.
ObjectiveTo improve health knowledge, facilitate healthy behaviors, and provide social support for a high-risk population of women by implementing a culturally tailored, gender-specific lifestyle intervention program.DesignEvidence-based practice project.Setting/Local ProblemA Chicago neighborhood in Cook County, Illinois, where there are increased rates of diabetes, heart disease, cancer, stroke, hypertension, obesity, preterm birth, and violent crime.ParticipantsFemale residents of the community, ages 19 to 45 years; 12 participants registered for the program, and 11 participants completed the entire 2-month program.Interventions/MeasurementsThe BE WISE Lifestyle Intervention, a culturally tailored, gender-specific behavior change curriculum, was used for this project. An interprofessional team was used to enhance participant experience, and neighborhood collaborations were established to create sustainability of efforts. Pre- and postintervention measures of diet, physical activity, social support, and knowledge acquisition were used to evaluate outcomes.ResultsImprovement was noted for knowledge in most of the content areas, as well as for dietary and physical activity behaviors. All participants rated the program highly and responded positively to the social support experienced in the group.ConclusionCulturally tailored lifestyle interventions can be effective in improving knowledge and encouraging behavior change, especially when delivered in group settings to enhance social support. Community-level collaborations enhance interventions by providing local support and resources for participants. Because behavior change takes time, follow-up at the 6-month and 1-year intervals is recommended to determine longer-term outcomes.  相似文献   
4.
《Cancer cell》2022,40(10):1223-1239.e6
  1. Download : Download high-res image (205KB)
  2. Download : Download full-size image
  相似文献   
5.
6.
A recent United Nations (UN) report concluded that the inability to curb fossil fuel emissions from burning coal, oil, and gas has resulted in a short window of time to prevent an abysmal future. The health care industry remains one of the largest contributors to climate change. NPs must not only recognize the clinical presentations resulting from climate change but must also contribute to the efforts presented by the UN report to create a health system that does not contribute to climate change. This article reviews potential ways to decrease the health care sector’s contribution to climate change.  相似文献   
7.
8.
9.
The aim of this study was to explore effects of a major urban reconstruction on physical activity (PA) behavior by comparing PA intensity hotspots before and after the tunneling of a highway with a new infrastructure prioritized for walking and cycling. In total, 126 individuals participated before and after the tunneling. GPS loggers and accelerometers were used to assess location and PA levels. A geographic information system (GIS) was used to perform optimized hotspot analyses on PA data, both on transport and stationary data points. The results showed several changes in PA hotspots on trip data, even if total PA levels did not change. At follow-up, PA intensity hotspots were more connected, with the new infrastructure as a central connection. This was true for higher and lower educated individuals. Therefore, if changes in the built environment do not result in changes on population-level outcomes, this does not imply that they have no impact on behavior.  相似文献   
10.
目的观察南星骨痛凝胶贴膏对兔膝骨关节炎关节形态及血清IL-1、TNF-α、MMP-13、TIMP-1表达的影响,探讨南星骨痛凝胶贴膏治疗兔膝骨关节炎可能的作用机制。方法 18只健康6月龄新西兰兔随机分成3组:空白组(A组)、模型组(B组)、骨痛膏治疗组(C组). BC组用3%木瓜蛋白酶关节腔内注射造模后C组给予南星骨痛凝胶贴膏外敷,给药4周后,用Aloka Latheta LCT-200观察兔膝骨关节影像学改变、用ELISA法检测血清IL-1、TNF-α、MMP-13、TIMP-1含量。结果 C组兔膝关节病变程度较B组轻,C组兔血清中IL-1、TNF-α、MMP-13含量较B组降低(P<0. 05),TIMP-1含量较B组升高(P <0. 05)。结论南星骨痛凝胶贴膏能减轻兔膝关节骨关节炎病变程度,对关节软骨有保护作用,其作用机制可能与抑制炎症因子IL-1、TNF-α及MMP-13表达,增加TIMP-1表达有关。  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