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   11818篇
  免费   946篇
  国内免费   43篇
耳鼻咽喉   29篇
儿科学   310篇
妇产科学   143篇
基础医学   197篇
口腔科学   166篇
临床医学   5957篇
内科学   1118篇
皮肤病学   109篇
神经病学   271篇
特种医学   231篇
外国民族医学   1篇
外科学   767篇
综合类   1098篇
一般理论   4篇
预防医学   1565篇
眼科学   41篇
药学   555篇
  48篇
中国医学   144篇
肿瘤学   53篇
  2024年   1篇
  2023年   358篇
  2022年   258篇
  2021年   470篇
  2020年   739篇
  2019年   582篇
  2018年   482篇
  2017年   505篇
  2016年   497篇
  2015年   427篇
  2014年   808篇
  2013年   1099篇
  2012年   679篇
  2011年   635篇
  2010年   602篇
  2009年   588篇
  2008年   488篇
  2007年   510篇
  2006年   497篇
  2005年   371篇
  2004年   322篇
  2003年   282篇
  2002年   175篇
  2001年   172篇
  2000年   176篇
  1999年   183篇
  1998年   135篇
  1997年   128篇
  1996年   113篇
  1995年   140篇
  1994年   85篇
  1993年   22篇
  1992年   18篇
  1991年   17篇
  1990年   16篇
  1989年   15篇
  1988年   9篇
  1987年   5篇
  1986年   8篇
  1985年   44篇
  1984年   37篇
  1983年   23篇
  1982年   27篇
  1981年   14篇
  1980年   39篇
  1978年   2篇
  1977年   2篇
  1974年   1篇
  1973年   1篇
排序方式: 共有10000条查询结果,搜索用时 125 毫秒
1.
目的:构建儿科门急诊药房用药指导岗位胜任力标准。方法:运用问卷调研法收集各大儿科医院中患儿照护人需要的用药指导信息,运用文献分析法查阅国内外规范中要求药师提供的用药指导信息,据此设计专家函询问卷。选取全国三甲儿科医院或医院儿科的20名专家,采用Delphi法进行两轮专家函询。结果:问卷回收率为100%,两轮函询后,专家权威系数为0.83。各级指标变异系数均<0.25,专家意见肯德尔和谐系数为0.416~0.836,均满足P<0.05。建立的儿科门急诊药房用药指导岗位胜任力共分为4个层次的指标,其中一级指标3项、二级指标14项、三级指标20项,3项为儿科特色指标、四级指标7项,均为儿科特色指标。结论:本研究构建的儿科门急诊药房用药指导岗位胜任力标准具有权威性和科学性,"分剂量药品储存""儿童用药方法""喂药的技巧与对策"等指标体现了明确的儿科特色,为儿科门急诊药师的用药指导能力培养提供了方向和依据。  相似文献   
2.
ObjectiveTo assess whether long-term cancer survivors (≥5 years after diagnosis) are at an increased risk of experiencing an opioid-related emergency department (ED) visit or hospitalization compared with persons without cancer.MethodsA 1:1 matched retrospective cohort study was performed using the Surveillance, Epidemiology, and End Results–Medicare linked data sets. The analysis was conducted from October 2020 to December 2020 in persons who lived 5 years or more after a breast, colorectal, lung, or prostate cancer diagnosis matched to noncancer controls on the basis of age, sex, race, pain conditions, and previous opioid use. Fine-Gray regression models were used to assess the relationship between cancer survivorship status and opioid-related ED visit or hospitalization.ResultsThe incidence of opioid-related ED visits and hospitalizations was 51.2 (95% CI, 43.5 to 59.8) and 62.2 (95% CI, 53.4 to 72.1) per 100,000 person-years among cancer survivors and matched noncancer controls, respectively. No significant association was observed between survivorship and opioid-related adverse event among opioid naive (hazard ratio, 0.79; 95% CI, 0.61 to 1.02) and non-naive (hazard ratio, 1.26; 95% CI, 0.84 to 1.89) cohorts.ConclusionCancer survivors and noncancer controls had a similar risk of an ED visit or inpatient admission. Guidelines and policies should promote nonopioid pain management approaches especially to opioid non-naive older adults, a population at high risk for an opioid-related ED visit or hospitalization.  相似文献   
3.
4.
5.
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   
6.
疼痛是一种包含感觉、情绪和认知的复杂的生理、心理活动,是寻求医疗帮助常见的症状之一,对疼痛的缓解包括药物镇痛和物理镇痛等。口腔急诊科就诊患者中,主诉牙源性疼痛的最为常见,中山大学附属口腔医院急诊综合科2018—2020年急诊就诊一般情况分析显示,因剧烈疼痛就诊的患者占61%,其中牙源性疼痛占75%。牙源性疼痛多由牙源性感染引起,急性期疼痛剧烈,严重影响患者的工作与生活,作为口腔急诊科医生必须及时准确判断病情,坚持立即对患牙进行局部治疗、辅以镇痛药、必要时再添加抗生素控制感染的治疗原则,对患牙进行应急处置,以减轻患者的痛苦。  相似文献   
7.
通过回顾2014年以来全国各省辐射事故应急演习工作的成果和经验,结合国际原子能机构(IAEA)、生态环境部关于辐射事故应急演习的相关指导文件,总结了综合性辐射事故应急演习的开展流程。此外,基于演习实战化的要求,详细介绍演习规划、准备、实施、评估等环节的技术要求和规范方法,为开展辐射事故应急演习提供参考和借鉴。  相似文献   
8.
IntroductionIntravenous catheter insertion is a highly invasive medical procedure that causes fear and anxiety in children. This study aimed to analyze the effect of a toy (with music and movement) distraction method on fear and anxiety in children aged 4 to 6 years.MethodsThis experimental, randomized clinical trial used parallel trial design guided by the Consolidated Standards of Reporting Trials checklist. Using simple randomization, eligible children (age 4-6; N = 60) were assigned to the intervention group (n = 30), who received the toy distraction method, or to the control group (n = 30), who received standard care. The Children’s Fear Scale was used to evaluate the fear levels, and Children’s State Anxiety Scale was used to evaluate anxiety levels. Physiological parameters (pulse, oxygen saturation) and crying time were monitored by the researcher as indicators of fear and anxiety. The chi-square test, repeated measures analysis of variance, Friedman test, t test, the Mann-Whitney U test, Wilcoxon test, and the intraclass correlation test were used for data analysis.ResultsThere was no statistically significant difference in terms of fear and anxiety scores, physiological parameters, and crying time during the procedure between the children in the intervention and control group.DiscussionWe found that this method of toy distraction was not effective in reducing fear or anxiety during the intravenous catheter insertion procedure. Accordingly, we recommend that this distraction method be performed in different age groups and with larger samples in various painful and stressful practices in the future and that comparison be made with various distraction methods.  相似文献   
9.
ObjectivesTo determine which nursing home (NH) resident-level admission characteristics are associated with potentially preventable emergency department (PPED) transfers.DesignWe conducted a population-level retrospective cohort study on NH resident data collected using the Resident Assessment Instrument-Minimum Data Set Version 2.0 and linked to the National Ambulatory Care Reporting System for ED transfers.SettingWe used all NH resident admission assessments from January 1, 2017, to December 31, 2018, in Ontario.ParticipantsThe cohort included the admission assessment of 56,433 NH residents.MethodsPPED transfers were defined based on the International Classification of Disease, Version 10 (Canadian) We used logistic regression with 10-fold cross-validation and computed average marginal effects to identify the association between resident characteristics at NH admission and PPED transfers within 92 days after admission.ResultsOverall, 6.2% of residents had at least 1 PPED transfer within 92 days of NH admission. After adjustment, variables that had a prevalence of 10% or more that were associated with a 1% or more absolute increase in the risk of a PPED transfer included polypharmacy [of cohort (OC) 84.4%, risk difference (RD) 2.0%], congestive heart failure (OC 29.0%, RD 3.0%), and renal failure (OC 11.6%, RD 1.2%). Female sex (OC 63.2%, RD -1.3%), a do not hospitalize directive (OC 24.4%, RD -2.6%), change in mood (OC 66.9%, RD -1.2%), and Alzheimer's or dementia (OC 62.1%, RD -1.2%) were more than 10% prevalent and associated with a 1% or more absolute decrease in the risk of a PPED.Conclusions and ImplicationsThough many routinely collected resident characteristics were associated with a PPED transfer, the absence of sufficiently discriminating characteristics suggests that emergency department visits by NH residents are multifactorial and difficult to predict. Future studies should assess the clinical utility of risk factor identification to prevent transfers.  相似文献   
10.
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