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   695篇
  免费   101篇
  国内免费   7篇
儿科学   20篇
妇产科学   22篇
基础医学   32篇
口腔科学   11篇
临床医学   90篇
内科学   60篇
皮肤病学   29篇
神经病学   43篇
特种医学   18篇
外科学   81篇
综合类   50篇
一般理论   3篇
预防医学   203篇
眼科学   16篇
药学   96篇
中国医学   19篇
肿瘤学   10篇
  2024年   1篇
  2023年   15篇
  2022年   12篇
  2021年   24篇
  2020年   39篇
  2019年   23篇
  2018年   31篇
  2017年   45篇
  2016年   34篇
  2015年   42篇
  2014年   45篇
  2013年   63篇
  2012年   26篇
  2011年   45篇
  2010年   40篇
  2009年   29篇
  2008年   37篇
  2007年   35篇
  2006年   34篇
  2005年   20篇
  2004年   20篇
  2003年   18篇
  2002年   12篇
  2001年   16篇
  2000年   9篇
  1999年   4篇
  1998年   9篇
  1997年   3篇
  1996年   8篇
  1995年   9篇
  1994年   10篇
  1993年   4篇
  1992年   5篇
  1991年   3篇
  1990年   4篇
  1989年   1篇
  1988年   3篇
  1987年   5篇
  1986年   5篇
  1985年   2篇
  1983年   1篇
  1982年   1篇
  1981年   2篇
  1980年   3篇
  1979年   2篇
  1977年   1篇
  1976年   1篇
  1975年   2篇
排序方式: 共有803条查询结果,搜索用时 18 毫秒
1.
Even though 90% of the world’s population is covered by the World Health Organization’s Framework Convention on Tobacco Control, it is estimated that only one-fifth (21%) and half (49%) of the countries that ratified this convention will achieve the target of reducing tobacco use by 30 % among men and women respectively in 2025. Over the past decade, there has been an increasing trend in the use of electronic cigarettes or e-cigarettes for recreational use as well as smoking cessation. In concurrence with the increasing use of e-cigarettes among smokers of different age groups, nations have developed relevant national regulations on its sale, advertisement, packaging, product regulation, taxation, and surveillance. The countries of the Gulf Cooperation Council (GCC) region have also witnessed several legislations, at varying extent, related to the use of electronic cigarettes. However, the evidence on the use of electronic nicotine delivery systems remains scarce in the GCC region. Thus, further research on this emerging public health issue is warranted to generate the evidence necessary for the formulation of comprehensive tobacco control laws and effective prevention strategies.  相似文献   
2.
Media can be a powerful communication tool to promote breastfeeding programs, influence mother's breastfeeding behaviour, and generate support among stakeholders for breastfeeding. Yet, there is little information on how media coverage influences a country's breastfeeding enabling environment. This study addressed this gap by conducting a retrospective content analysis of documents published between January 1, 2017 and January 1, 2018 to analyse the media coverage related to breastfeeding in Mexico. Content analysis was based on the breastfeeding gear model and a strategic planning technique to identify strengths, weaknesses, opportunities, and threats for enabling the national breastfeeding environment. Media coverage of breastfeeding was more frequent in August (36% of all documents). The top three topics commonly covered by the media were advocacy events promoting breastfeeding, promotion campaigns, and changes in breastfeeding legislation and policy. In general, the media coverage focused on strengths of specific breastfeeding policies. There was limited news coverage of key factors that negatively influenced or threatened the breastfeeding environment. Findings support the need to design strategies to engage the media covering in more depth and breadth diverse aspects of breastfeeding protection, promotion, and support efforts in Mexico.  相似文献   
3.
4.
《Vaccine》2020,38(45):7118-7128
IntroductionToward the Global Vaccine Action Plan 2020 goal, almost 90% of countries have established a National Immunization Technical Advisory Group (NITAG). However, little is known about NITAG's contributions to governance.MethodsIn 2017–2018, a two-step, qualitative retrospective study was conducted. Jordan (JO), Argentina (AR), and South Africa (SA) were selected owing to government-financed NITAGs from middle-income countries (MICs), geographic diversity, and a vaccine introduction with NITAG support. Country case studies were developed, collecting data through desk review and face-to-face key informant interviews (KIIs) from Ministry of Health (MoH) and NITAG. Case studies were analyzed together, to assess governance applying the European Observatory on Health Systems and Policies framework focusing on transparency, accountability, participation, integrity, and policy capacity (TAPIC).ResultsDocument review and 53 KII (22 AR, 20 SA, 11 JO) showed NITAGs played a pivotal role as advisors promoting a culture of evidence-informed policies. NITAGs strengthened governance, although practices varied among countries. Meetings were conducted behind-closed-doors, participation restricted to members, only in one country agendas, and recommendations were public (AR). To increase participation, policy capacity, and transparency, countries considered adding experts in communications, advocacy, and economics. AR and SA contemplated including community members. NITAGs functioned autonomously from the government, with no established internal or external monitoring or supervision. NITAG meeting minutes allowed the review of integrity, adherence to terms of reference, standard operating procedures, and conflict of interest (CoI). For the most part, NITAGs abided by their mandates. Significant issues were related to the level of MoH support and oversight of CoI declaration and documentation.ConclusionsSystematically implementing governance approaches could improve processes, better tailor policies, and implementation. The long-term survival and resilience of NITAGs in these countries showed they play a significant role in strengthening governance. Lessons learned could be useful to those promoting country-driven evidence-informed decision-making.  相似文献   
5.
Anabolic androgenic steroids (AAS) can cause serious adverse effects when used without a therapeutic purpose. This article aims to show that the AAS are susceptible to being sold on the black market. We also aim to describe how certain limitations on the health inspection services of the Galician health service to pursue these illegal actions prompted a regulatory initiative demanding that additional actions be granted to community pharmacies when dispensing AAS. Four pharmacy inspections detected the diversion of a total of 3118 packages of AAS, which led to the opening of four disciplinary proceedings. In two of these, specialized police forces were called in as there was sufficient evidence of possible diversion to gymnasiums, resulting in a police operation called Operation Fitness.  相似文献   
6.
7.
A review of the literature on dental auxiliaries and their utilization in the dental workforce is presented, and their future role is examined in the light of broader issues relating to changing disease patterns and service delivery. Legislative factors, productivity, quality assurance and the potential scope for dental auxiliaries in both the public sector and private practice setting are discussed. A strategy for adopting a team approach in the delivery of dental services is suggested, which would necessitate the dentist taking on the role of team leader and maintaining responsibility for overall treatment planning and quality assurance. Dental auxiliaries could provide basic preventive and restorative dental services, allowing dentists to concentrate on providing more complex high-technology treatment. Implications for the future training of dental auxiliaries are presented.  相似文献   
8.
王波  邵蓉 《中国现代应用药学》2023,40(14):2010-2015
目的 全面理解FDA指导原则管理规范(Good Guidance Practice,GGP)的起草背景、基本结构、主要特点、运行成效及改进方向,为中国将来制定药品监管指导原则管理规范提供参考。方法 采用文献研究与比较法学研究的方法,对美国《联邦公报》等政府文件中与GGP相关的内容作梳理,结合美国行政法律制度分析其生成发展环境。结果 GGP的出台依赖社会力量推动,它一直将指导原则的外延界定、非法律强制性的内涵属性、充分引入公众参与,以及建立通畅的评议反映渠道作为基本内容,而社会共治则是GGP最核心的原则。近些年FDA对指导原则制定过程的科层管理效率也提出了新要求。结论 中国未来可以借鉴GGP在指导原则分类分级、公众参与、部门协作机制等方面的制度成果;同时考虑到中外法律体系差异等因素,还应该在指导原则属性定位等领域进行规范。  相似文献   
9.
10.
Organs from uncontrolled DCD donors (uDCDs) have expanded donation in Europe since the 1980s, but are seldom used in the United States. Cited barriers include lack of knowledge about the potential donor pool, lack of robust outcomes data, lack of standard donor eligibility criteria and preservation methods, and logistical and ethical challenges. To determine whether it would be appropriate to invest in addressing these barriers and building this practice, we sought to enumerate the potential pool of uDCD donors. Using data from the Nationwide Emergency Department Sample, the largest all‐payer emergency department (ED) database, between 2013 and 2016, we identified patients who had refractory cardiac arrest in the ED. We excluded patients with contraindications to both deceased donation (including infection, malignancy, cardiopulmonary disease) and uDCD (including hemorrhage, major polytrauma, burns, and poisoning). We identified 9828 (range: 9454‐10 202) potential uDCDs/y; average age was 32 years, and all were free of major comorbidity. Of these, 91.1% had traumatic deaths, with major causes including nonhead blunt injuries (43.2%) and head injuries (40.1%). In the current era, uDCD donors represent a significant potential source of unused organs. Efforts to address barriers to uDCD in the United States should be encouraged.  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