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   64133篇
  免费   5065篇
  国内免费   1000篇
耳鼻咽喉   481篇
儿科学   1005篇
妇产科学   1198篇
基础医学   3698篇
口腔科学   1129篇
临床医学   12493篇
内科学   6719篇
皮肤病学   1468篇
神经病学   2072篇
特种医学   1069篇
外国民族医学   2篇
外科学   6004篇
综合类   8749篇
现状与发展   3篇
一般理论   8篇
预防医学   13486篇
眼科学   377篇
药学   6350篇
  141篇
中国医学   2202篇
肿瘤学   1544篇
  2024年   164篇
  2023年   1291篇
  2022年   2625篇
  2021年   3435篇
  2020年   3684篇
  2019年   2586篇
  2018年   2416篇
  2017年   2428篇
  2016年   2524篇
  2015年   2452篇
  2014年   5255篇
  2013年   5371篇
  2012年   4373篇
  2011年   4413篇
  2010年   3578篇
  2009年   3064篇
  2008年   3097篇
  2007年   2774篇
  2006年   2462篇
  2005年   1928篇
  2004年   1674篇
  2003年   1363篇
  2002年   997篇
  2001年   796篇
  2000年   699篇
  1999年   617篇
  1998年   574篇
  1997年   469篇
  1996年   412篇
  1995年   327篇
  1994年   291篇
  1993年   273篇
  1992年   262篇
  1991年   213篇
  1990年   160篇
  1989年   172篇
  1988年   152篇
  1987年   134篇
  1986年   86篇
  1985年   135篇
  1984年   104篇
  1983年   76篇
  1982年   59篇
  1981年   62篇
  1980年   56篇
  1979年   29篇
  1978年   22篇
  1977年   22篇
  1976年   22篇
  1975年   10篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
PurposeUnderstanding the value of genetic screening and testing for monogenic disorders requires high-quality, methodologically robust economic evaluations. This systematic review sought to assess the methodological quality among such studies and examined opportunities for improvement.MethodsWe searched PubMed, Cochrane, Embase, and Web of Science for economic evaluations of genetic screening/testing (2013-2019). Methodological rigor and adherence to best practices were systematically assessed using the British Medical Journal checklist.ResultsAcross the 47 identified studies, there were substantial variations in modeling approaches, reporting detail, and sophistication. Models ranged from simple decision trees to individual-level microsimulations that compared between 2 and >20 alternative interventions. Many studies failed to report sufficient detail to enable replication or did not justify modeling assumptions, especially for costing methods and utility values. Meta-analyses, systematic reviews, or calibration were rarely used to derive parameter estimates. Nearly all studies conducted some sensitivity analysis, and more sophisticated studies implemented probabilistic sensitivity/uncertainty analysis, threshold analysis, and value of information analysis.ConclusionWe describe a heterogeneous body of work and present recommendations and exemplar studies across the methodological domains of (1) perspective, scope, and parameter selection; (2) use of uncertainty/sensitivity analyses; and (3) reporting transparency for improvement in the economic evaluation of genetic screening/testing.  相似文献   
3.
4.
5.
6.
Most surgical and anaesthetic mortality and morbidity occurs postoperatively, disproportionately affecting low- and middle-income countries. Various short courses have been developed to improve patient outcomes in low- and middle-income countries, but none specifically to address postoperative care and complications. We aimed to identify key features of a proposed short-course addressing this topic using a Delphi process with low- and middle-income country anaesthesia providers trained as short-course facilitators. An initial questionnaire was co-developed from literature review and exploratory workshops to include 108 potential course features. Features included content; teaching method; appropriate participants; and appropriate faculty. Over three Delphi rounds (panellists numbered 86, 64 and 35 in successive cycles), panellists indicated which features they considered most important. Responses were analysed by geographical regions: Africa, the Americas, south-east Asia and Western Pacific. Ultimately, panellists identified 60, 40 and 54 core features for the proposed course in each region, respectively. There were high levels of consensus within regions on what constituted core course content, but not between regions. All panellists preferred the small group workshop teaching method irrespective of region. All regions considered anaesthetists to be key facilitators, while all agreed that both anaesthetists and operating theatre nurses were key participants. The African and Americas regional panels recommended more multidisciplinary healthcare professionals for participant roles. Faculty from high-income countries were not considered high priority. Our study highlights variability between geographical regions as to which course features were perceived as most locally relevant, supporting regional adaptation of short-course design rather than a one-size-fits-all model.  相似文献   
7.
Anaplastic thyroid carcinoma (ATC) is an aggressive thyroid malignancy with high mortality rate. This malignancy arises in thyroid follicular cells either denovo or with an associated differentiated thyroid carcinoma component. Clinically, it usually presents as a rapidly enlarging mass, pain and locally compressive symptoms. Histopathologic variability and heterogeneity often pose diagnostic challenges, especially in scant and paucicellular specimens. This article describes the clinical, histopathologic and molecular features of ATC and also addresses the associated diagnostic limitations and challenges.  相似文献   
8.
9.
深化家庭医生签约服务是深化医药卫生体制改革、强化基层医疗卫生服务、实现"健康中国"战略目标的重要选择,也是当前更好维护人民群众健康的重要途径。为有效推进签约服务工作,国家陆续推出各项政策,全国各地也在积极进行实践探索,成效明显。但是,签约服务仍面临诸多问题,其中"执行难"是签约服务深度推进的一大困境。通过史密斯政策执行过程模型,结合签约服务政策执行过程,发现签约服务仍存在法治性不足、政策执行人员水平不高、激励不足、政策环境影响等诸多制约因素。因此,需要从法律和制度方面进行顶层设计、提升执行人员素质和职业认同、建立医患互信、优化政策执行环境等角度进行政策创新,探索家庭医生签约服务可持续发展的路径。  相似文献   
10.
牙外伤是口腔急诊常见的病症之一,及时准确的牙髓活力判断是正确治疗以利维持美学与功能的重要前提条件。文章通过对牙髓活力的生物学基础、牙髓活力测验方法及评价、外伤牙髓受损类型和牙髓活力特点分析,在国际牙外伤临床治疗指南的方向指导下,结合案例和经验,概括外伤牙活力与实施临床治疗方案的关系,为提高牙外伤的临床诊治思维、科学精准和个性化治疗设计提供支持,具有重要的应用价值。  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