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   83072篇
  免费   5168篇
  国内免费   564篇
耳鼻咽喉   360篇
儿科学   1735篇
妇产科学   1389篇
基础医学   3785篇
口腔科学   1293篇
临床医学   15194篇
内科学   8673篇
皮肤病学   602篇
神经病学   2302篇
特种医学   1037篇
外国民族医学   1篇
外科学   6270篇
综合类   10766篇
现状与发展   4篇
一般理论   7篇
预防医学   26399篇
眼科学   397篇
药学   5518篇
  150篇
中国医学   1210篇
肿瘤学   1712篇
  2024年   58篇
  2023年   1602篇
  2022年   2642篇
  2021年   3989篇
  2020年   4536篇
  2019年   4416篇
  2018年   3983篇
  2017年   3174篇
  2016年   2669篇
  2015年   2870篇
  2014年   6843篇
  2013年   6358篇
  2012年   5727篇
  2011年   5929篇
  2010年   4775篇
  2009年   4196篇
  2008年   4135篇
  2007年   3763篇
  2006年   3146篇
  2005年   2235篇
  2004年   1871篇
  2003年   1433篇
  2002年   1077篇
  2001年   864篇
  2000年   718篇
  1999年   597篇
  1998年   502篇
  1997年   378篇
  1996年   263篇
  1995年   219篇
  1994年   185篇
  1993年   190篇
  1992年   136篇
  1991年   119篇
  1990年   69篇
  1989年   62篇
  1988年   57篇
  1985年   289篇
  1984年   387篇
  1983年   321篇
  1982年   322篇
  1981年   315篇
  1980年   260篇
  1979年   233篇
  1978年   211篇
  1977年   153篇
  1976年   137篇
  1975年   118篇
  1974年   102篇
  1973年   77篇
排序方式: 共有10000条查询结果,搜索用时 51 毫秒
11.
Recent epidemiological studies suggested that proton pump inhibitor (PPI) use was associated with an increased risk of biliary tract cancer (BTC), however, confounders were not adequately controlled. Our study aimed to evaluate PPI use and subsequent risk of BTC and its subtypes in three well-established cohorts. We conducted a pooled analysis of the subjects free of cancers in UK Biobank (n = 463 643), Nurses' Health Study (NHS, n = 80 235) and NHS II (n = 95 869). Propensity score weighted Cox models were used to estimate marginal HRs of PPIs use on BTC risk, accounting for potential confounders. We documented 284 BTC cases in UK Biobank (median follow-up: 7.6 years), and 91 cases in NHS and NHS II cohorts (median follow-up: 15.8 years). In UK biobank, PPI users had a 96% higher risk of BTC compared to nonusers in crude model (HR 1.96, 95% CI 1.44-2.66), but the effect was attenuated to null after adjusting for potential confounders (HR 0.95, 95% CI 0.60-1.49). PPI use was not associated with risk of BTC in the pooled analysis of three cohorts (HR 0.93, 95% CI 0.60-1.43). We also observed no associations between PPI use with risk of intrahepatic (HR 1.00, 95% CI 0.49-2.04), extrahepatic bile duct (HR 1.09, 95% CI 0.52-2.27) and gallbladder cancers (HR 0.66, 95% CI 0.26-1.66) in UK Biobank. In summary, regular use of PPIs was not associated with the risk of BTC and its subtypes.  相似文献   
12.
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   
13.
14.
Concentrations of 18 metals and elements (MEs) in the gills, skin, muscle and liver of Carasobarbus luteus and Cyprinus carpio from the Atatürk Reservoir in Turkey were investigated. The results revealed that variations in the ME contents between fish species can be attributed to different diets. The highest contents of most MEs were recorded in the gills. Gender had no significant effect on the contents of most MEs in the tissues of fish species investigated. The relations between MEs in tissues and fish size were not clear and consistent. Health risk assessment methods indicated that consumption of the studied fish species is safe. It was estimated that daily consumption of 140 g of C. carpio or 170 g of C. luteus would not be expected to cause any health risks. Furthermore, it was found that fish species would provide significant benefits in terms of intake of essential MEs.  相似文献   
15.
16.
17.
18.
An essential role of critical care advanced practice providers—advanced practice registered nurses and physician assistants—is to have knowledge and competency to make accurate and efficient decisions. The ability to manage clinical scenarios involving medically deteriorating patients requires higher-order cognitive thinking and leadership skills that are challenging to extrapolate in traditional interviews. In critical care, advanced practice providers must make rapid clinical assessments and implement appropriate medical interventions to deter progression of life-threatening illnesses. Adding clinical simulation to the traditional interview allows interviewers to evaluate applicants’ crisis resource management skills, leadership, and clinical competency.  相似文献   
19.
The coronavirus disease 2019 pandemic disrupted health care, requiring organizational leaders to act quickly to manage the health-related concerns of individuals and communities. The ability to offer a variety of digitally enabled telehealth services with 24/7 access to nurse practitioners and physician assistants allowed us to care for patients in their homes. It reduced the spread of the virus, protected our employees from further disease spread, and provided early interventions to those in need. The roles of nurse practitioner leaders, the enacted strategies, and patient outcomes demonstrate the impact of an innovative digital care delivery model on care across the continuum.  相似文献   
20.
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