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   560128篇
  免费   44132篇
  国内免费   13113篇
耳鼻咽喉   6966篇
儿科学   13058篇
妇产科学   9319篇
基础医学   42226篇
口腔科学   13902篇
临床医学   58987篇
内科学   62676篇
皮肤病学   6943篇
神经病学   28876篇
特种医学   13619篇
外国民族医学   42篇
外科学   54829篇
综合类   90597篇
现状与发展   32篇
一般理论   75篇
预防医学   62941篇
眼科学   7329篇
药学   57839篇
  811篇
中国医学   63263篇
肿瘤学   23043篇
  2024年   1816篇
  2023年   9664篇
  2022年   17835篇
  2021年   24097篇
  2020年   23097篇
  2019年   26939篇
  2018年   24319篇
  2017年   21777篇
  2016年   19129篇
  2015年   17993篇
  2014年   36823篇
  2013年   38976篇
  2012年   33116篇
  2011年   35438篇
  2010年   28647篇
  2009年   25299篇
  2008年   23929篇
  2007年   24450篇
  2006年   21128篇
  2005年   18168篇
  2004年   14837篇
  2003年   12947篇
  2002年   10163篇
  2001年   8996篇
  2000年   7591篇
  1999年   6375篇
  1998年   5232篇
  1997年   4824篇
  1996年   4050篇
  1995年   3865篇
  1994年   3645篇
  1993年   2997篇
  1992年   2947篇
  1991年   2607篇
  1990年   2276篇
  1989年   2046篇
  1988年   1922篇
  1987年   1676篇
  1985年   4791篇
  1984年   5813篇
  1983年   4089篇
  1982年   4797篇
  1981年   4165篇
  1980年   3697篇
  1979年   3393篇
  1978年   2896篇
  1977年   2195篇
  1976年   2499篇
  1975年   1843篇
  1974年   1616篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
<正>我国结核患者在2011年统计已达500万例,仅次于印度位居世界第二[1]。临床多见抗结核药物引起肝损害及过敏反应,对眼部的副反应关注较少[2]。笔者临床中发现部分结核患者在抗结核治疗早期可出现视物模糊、异物感、干涩及视物不持久等类似干眼的主诉,眼科常规检查未发现明显视神经病变,更多为眼表的改变。笔者观察抗结核药物对眼表的毒副反应,报道如下。1资料与方法1.1研究对象收集2012年1月—2014年10月  相似文献   
122.
动脉粥样硬化是导致心血管疾病及死亡的主要原因,严重危害人类健康。目前预防动脉粥样硬化
的机制众多,以调脂代谢降低炎症反应为基础较多。本文将近几年他啶类、贝特类、烟酸类以及中药等调脂药物
对预防动脉粥样硬化的药理作用以及临床应用研究现状做一综述。  相似文献   
123.
目的探讨分诊安全管理结合风险管理提高急诊科护理质量评分的作用。方法该院于2018年6月起加强对急诊科的分诊安全管理结合风险管理,以于2017年6月—2019年6月在该院急诊科就诊的患者为研究对象,评价管理策略实施前后护理风险发生率、护理质量评分以及患者满意度等评价指标变化情况。结果实施后基础护理、实践操作、消毒隔离、急救药品、护理文件方面的护理质量评分均较实施前显著提高(P<0.05);实施后护理差错、护理缺陷、护理投诉的发生率分别为0.26%、0.58%、0.19%,均较实施前显著降低(P<0.05);实施后护理总满意率为94.92%,较实施前显著提高(P<0.05)。结论分诊安全管理结合风险管理有效提高了急诊科护理质量,提升了患者满意度,减少了护理风险事件的发生。  相似文献   
124.
125.
ObjectiveHospitalization-associated disability [HAD, ie, the loss of ability to perform ≥1 basic activities of daily living (ADLs) independently at discharge] is a frequent condition among older patients. The present study assessed whether a simple inpatient exercise program decreases HAD incidence in acutely hospitalized very old patients.DesignIn this randomized controlled trial (Activity in Geriatric Acute Care) participants were assigned to a control or intervention group and were assessed at baseline, admission, discharge, and 3 months thereafter.Setting and ParticipantsIn total, 268 patients (mean age 88 years, range 75–102) admitted to an acute care for older patients unit of a public hospital were randomized to a control (n = 125) or intervention (exercise) group (n = 143).MethodsBoth groups received usual care, and patients in the intervention group also performed simple supervised exercises (walking and rising from a chair, for a total duration of ∼20 minutes/day). We measured ADL function (Katz index) and incident HAD at discharge and after 3 months (primary outcome) and Short Physical Performance Battery, ambulatory capacity, number of falls, rehospitalization, and death during a 3-month follow-up (secondary outcomes).ResultsMedian duration of hospitalization was 7 days (interquartile range 4 days). The intervention group had a lower risk of HAD with reference to both baseline [odds ratio (OR) 0.36; 95% confidence interval (CI) 0.17–0.76, P = .007] and admission (OR 0.29; 95% CI 0.10–0.89, P = .030). A trend toward an improved ADL function at discharge vs admission was found in the intervention group compared with controls (OR 0.32; 95% CI ‒0.04 to 0.68; P = .083). No between-group differences were noted for the other endpoints (all P > .05).Conclusion and ImplicationsA simple inpatient exercise program decreases risk of HAD in acutely hospitalized, very old patients.  相似文献   
126.
《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   
127.
  1. Download : Download high-res image (232KB)
  2. Download : Download full-size image
  相似文献   
128.
129.
脑卒中患者在面对复杂的治疗期、漫长的康复期及难以预测的病情变化时容易产生对疾病或疾病进展的恐惧。恐惧疾病进展会损害脑卒中患者的身心健康和社会功能,最终影响患者的康复和预后。从恐惧疾病进展的定义、测量工具、国内外研究现状及影响因素几个方面进行综述,为临床护理人员深入了解脑卒中患者恐惧疾病进展现状、开展相关护理实践和临床研究提供依据。  相似文献   
130.
《Clinical neurophysiology》2020,131(1):259-264
ObjectivesFasciculation potentials (FP) are an important consideration in the electrophysiological diagnosis of ALS. Muscle ultrasonography (MUS) has a higher sensitivity in detecting fasciculations than electromyography (EMG), while in some cases, it is unable to detect EMG-detected fasciculations. We aimed to investigate the differences of FP between the muscles with and without MUS-detected fasciculations (MUS-fas).MethodsThirty-one consecutive patients with sporadic ALS were prospectively recruited and in those, both needle EMG and MUS were performed. Analyses of the amplitude, duration, and number of phases of EMG-detected FPs were performed for seven muscles per patient, and results were compared between the muscles with and without MUS-fas in the total cohort.ResultsThe mean amplitude and phase number of FP were significantly lower in patients with EMG-detected FP alone (0.39 ± 0.25 mV and 3.21 ± 0.88, respectively) than in those with both FP and MUS-fas (1.22 ± 0.92 mV and 3.74 ± 1.39, respectively; p < 0.0001 and p = 0.017, Welch’s t-test).ConclusionSmall FP may be undetectable with MUS. MUS cannot replace EMG in the diagnostic approach for ALS.SignificanceClinicians should use a combination of EMG and MUS for the detection and quantitative analysis of fasciculation in ALS.  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