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   44996篇
  免费   1807篇
  国内免费   150篇
耳鼻咽喉   144篇
儿科学   1133篇
妇产科学   650篇
基础医学   2501篇
口腔科学   808篇
临床医学   5709篇
内科学   5493篇
皮肤病学   372篇
神经病学   1553篇
特种医学   475篇
外科学   2227篇
综合类   4620篇
一般理论   9篇
预防医学   17372篇
眼科学   204篇
药学   2290篇
  21篇
中国医学   546篇
肿瘤学   826篇
  2023年   848篇
  2022年   1451篇
  2021年   2043篇
  2020年   2176篇
  2019年   2803篇
  2018年   2457篇
  2017年   1700篇
  2016年   1052篇
  2015年   1303篇
  2014年   3315篇
  2013年   3135篇
  2012年   2880篇
  2011年   3163篇
  2010年   2451篇
  2009年   2212篇
  2008年   2130篇
  2007年   2017篇
  2006年   1544篇
  2005年   1054篇
  2004年   870篇
  2003年   668篇
  2002年   559篇
  2001年   481篇
  2000年   414篇
  1999年   331篇
  1998年   257篇
  1997年   196篇
  1996年   108篇
  1995年   118篇
  1994年   85篇
  1993年   88篇
  1992年   75篇
  1991年   48篇
  1990年   34篇
  1989年   27篇
  1988年   33篇
  1987年   21篇
  1985年   251篇
  1984年   365篇
  1983年   297篇
  1982年   308篇
  1981年   297篇
  1980年   242篇
  1979年   229篇
  1978年   203篇
  1977年   150篇
  1976年   136篇
  1975年   117篇
  1974年   101篇
  1973年   77篇
排序方式: 共有10000条查询结果,搜索用时 129 毫秒
1.
收集2000年1月1日至2021年12月1日发表的以突发公共卫生事件中公众的信息需求为研究主题的中英文文献,探讨公众信息需求的动机、主题和特征,分析研究现状。在突发公共卫生事件中,信息需求的动机主要包括自我保护、缓解认知失调、缓解焦虑、维持社会关系;信息需求的主题为事件信息、疾病及治疗信息、健康防护知识、政府和专家权威信息;信息需求的特征表现为强烈而迫切,具有多样性和系统性。突发公共卫生事件中的公众信息需求相关研究主要针对普通群众和各种网络用户,关注老年人、高危工作人群等的信息需求是今后研究的重点。研究结果为突发公共卫生事件信息资源建设和科学决策提供了借鉴。  相似文献   
2.
目的分析看图对话工具在妊娠期糖尿病(GDM)患者健康教育中的应用效果。方法选取2018年1月—2019年12月广西中医药大学附属瑞康医院收治的80例GDM患者,随机分为对照组和观察组,每组40例。对照组开展常规健康教育,观察组采用看图对话工具开展健康教育。比较两组健康教育前后的血糖指标和自护行为能力评分、自然分娩率。结果健康教育后,对照组患者空腹血糖、餐后2 h血糖及糖化血红蛋白水平分别为(6.62±1.24)mmol/L、(7.25±1.32)mmol/L及(6.84±1.26)%,观察组患者空腹血糖、餐后2 h血糖及糖化血红蛋白水平分别为(6.12±2.41)mmol/L、(7.92±1.25)mmol/L及(6.26±1.31)%,两组比较差异均有统计学意义(t=5.135、5.032、5.121,均P<0.05)。健康教育后,观察组患者自护行为能力评分均显著高于对照组(均P<0.05)。观察组自然分娩率为95.00%(38例),显著高于对照组(82.50%,33例),差异有统计学意义(χ2=5.314,P<0.05)。结论在GDM患者健康教育中应用看图对话工具取得了显著效果,不仅能控制患者的血糖水平,而且在提高自护行为能力评分和自然分娩率方面有显著优势。  相似文献   
3.
目的 分析河南省老年人社会经济地位与精神健康的关系。方法 使用多阶段分层整群抽样方法,以河南省18个省辖市的5 570名60岁及以上老年人为研究对象,采用有序logistic回归模型分析社会经济地位对老年人精神健康的影响,探讨医疗保险和居住安排的中介效应。结果 河南省老年人精神健康受损1 999人,受损率35.89%。有序logistic回归分析显示社会经济地位的三个维度均对老年人精神健康有显著影响(均P<0.05),月收入水平(OR = 0.598,95%CI:0.446 ~ 0.801)和受教育程度(OR = 1.617,95%CI:1.004 ~ 2.604)越高,老年人精神健康水平越好;原来职业的层级越高(OR = 1.325,95%CI:1.155 ~ 1.520),老年人精神健康水平越差。影响路径分析显示,城镇职工医保对老年人精神健康有促进作用(低SES:OR = 0.609,95%CI:0.422 ~ 0.878;高SES:OR = 0.380,95%CI:0.248 ~ 0.582),城乡居民医保对高SES老年人精神健康有促进作用(OR = 0.285,95%CI:0.181 ~ 0.448);此外,与配偶/伴侣居住(OR = 0.610,95%CI:0.483 ~ 0.769)、与子女居住(OR = 0.646,95%CI:0.520 ~ 0.803)缓解了社会经济弱势地位对老年人精神健康的负面影响。结论 河南省老年人精神健康受损率较高,社会经济地位的三个维度影响老年人的精神健康水平,医疗保险和居住安排在社会经济地位与老年精神健康的关系中具有显著的中介效应。  相似文献   
4.
In this paper, we argue that understanding and addressing the problem of poor-quality medical products requires a more interdisciplinary approach than has been evident to date. While prospective studies based on rigorous standardized methodologies are the gold standard for measuring the prevalence of poor-quality medical products and understanding their distribution nationally and internationally, they should be complemented by social science research to unpack the complex set of social, economic, and governance factors that underlie these patterns. In the following sections, we discuss specific examples of prospective quality surveys and of social science studies, highlighting the value of cross-sector partnerships in driving high-quality, policy-relevant research in this area.  相似文献   
5.
BackgroundPolypharmacy is commonly related to poor drug adherence, decreased quality of life and inappropriate prescribing in eldery. Furthermore, this condition also leads to a higher utilization of health services resources, due to the increased risk of adverse drug events, length of stays in hospitals and readmissions rates after discharge.ObjectiveThis Systematic Review aimed to synthesize the current evidence that evaluates pharmaceutical services on polymedicated patients, from an economic perspective.MethodsSystematic searches were conducted in MEDLINE, SCOPUS and Cochrane Library databases to identify studies that were published until January 2021. Experimental and observational studies were included in this review, using strict inclusion/exclusion criteria and were assessed for quality using the following tools: RoB and ROBINS-I. Two independent reviewers selected the articles and extracted the data.Results3,662 articles were retrieved from the databases. After the screening, 18 studies were included: 9 experimental and 9 observational studies. The studies reported that the integration of the pharmacist as a member of the healthcare team provides an optimized use of pharmacotherapy to polymedicated patients and contributes to health promotion, providing reduction of spending on medication, reduction of expenses related to emergency care and hospitalizations and other medical expenses. The ECRs made cost-effectiveness or cost-benefit analysis, and most of the Non Randomized studies had statistically significant cost savings even considering the expenses of pharmaceutical assistance. Experimental studies reported a cost reduction varying between US$ 193 to US$ 4,966 per patient per year. Furthermore, observational studies estimated a cost reduction of varying from US$ 3 to US$ 2,505 per patient per year. The cost savings are related to decrease in emergency visits and hospitalizations, through pharmacist intervention (medication review and pharmacotherapy follow-up).ConclusionsConsidering the set of studies included, pharmaceutical care services directed to polymedicated patients may cooperate to save financial resources. Most of the interventions showed positive economic trends and also contributed to improving clinical parameters and quality of life. However, due to the majority of the studies having exploratory or qualitative methodology, it is essential to carry out more robust studies, based on full economic evaluation.  相似文献   
6.
Racist policies and practices that restrict Black, as compared to white workers, from employment may drive racial inequities in birth outcomes among workers. This study examined the association between structural racism in labor markets, measured at a commuting zone where workers live and commute to work, and low-birthweight birth. We found the deleterious effect of structural racism in labor markets among US-born Southern Black pregnant people of working age, but not among African- or Caribbean-born counterparts in any US region. Our analysis highlights the intersections of structural racism, culture, migration, and history of racial oppression that vary across regions and birth outcomes of Black workers.  相似文献   
7.
目的调查少数民族地区青少年对新冠疫情的认知及应对情况。方法采用分层抽样的方法,通过“问卷星”在线平台对香格里拉市1949名在校学生进行调查。结果结果显示,81.94%的学生在2020年1月初之前已知晓疫情;83.12%的学生通过电视和微信知晓疫情;9333%的学生认为病毒通过飞沫传播;94.80%的学生会通过戴口罩、不聚餐等方式进行防护;疫情相关知识的正确率为71.44%。不同年龄、性别、民族、专业、生源地、家庭年收入的学生对部分调查问题的差异有统计学意义(P<0.05)。结论学生对疫情认知整体情况较好,部分问题仍有较大提升空间。学校应做好疫情常态化防控,完善心理疏导体系,多措并举,引导学生做好自我防护。  相似文献   
8.
9.
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   
10.
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   
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