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   16772篇
  免费   1260篇
  国内免费   89篇
耳鼻咽喉   34篇
儿科学   439篇
妇产科学   170篇
基础医学   350篇
口腔科学   216篇
临床医学   7635篇
内科学   1339篇
皮肤病学   102篇
神经病学   362篇
特种医学   309篇
外国民族医学   1篇
外科学   1015篇
综合类   1709篇
一般理论   4篇
预防医学   2711篇
眼科学   50篇
药学   1144篇
  97篇
中国医学   359篇
肿瘤学   75篇
  2024年   32篇
  2023年   470篇
  2022年   486篇
  2021年   796篇
  2020年   1003篇
  2019年   832篇
  2018年   710篇
  2017年   663篇
  2016年   699篇
  2015年   594篇
  2014年   1255篇
  2013年   1513篇
  2012年   1078篇
  2011年   1044篇
  2010年   957篇
  2009年   802篇
  2008年   708篇
  2007年   741篇
  2006年   652篇
  2005年   504篇
  2004年   416篇
  2003年   359篇
  2002年   200篇
  2001年   211篇
  2000年   205篇
  1999年   198篇
  1998年   151篇
  1997年   143篇
  1996年   124篇
  1995年   144篇
  1994年   90篇
  1993年   27篇
  1992年   21篇
  1991年   21篇
  1990年   17篇
  1989年   15篇
  1988年   10篇
  1987年   7篇
  1986年   9篇
  1985年   54篇
  1984年   41篇
  1983年   23篇
  1982年   32篇
  1981年   17篇
  1980年   41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 31 毫秒
91.
92.
Background: Pediatric cardiopulmonary arrest (CPA) outside of the hospital has a very high mortality rate. Objectives: To evaluate the etiology and initial compromise of pediatric CPA cases in hopes of developing strategies to improve out‐of‐hospital resuscitation. Methods: The Ontario Prehospital Advanced Life Support (OPALS) study was a large multicenter initiative to evaluate the impact of emergency medical services (EMS) programs on 17 communities with 40,000 critically ill and injured patients who were older than 11 years. As part of this study, the authors conducted a retrospective observational cohort study that included all children younger than 18 years of age with out‐of‐hospital CPA, during an 11‐year period from 1991–2002. CPA was defined as patient being pulseless, apneic, and requiring chest compressions. Data were collected from ambulance call reports and centralized dispatch data and were reviewed by two independent investigators. Results: There were 503 children with CPA in the sample. Mean age was 5.6 years (range, 0–17 yr); 58.4% of patients were male, and 37.8% were younger than 1 year of age. Cardiopulmonary resuscitation (CPR) first was started by a bystander in 32.4% of cases, whereas 66.0% were unwitnessed arrests. Initial rhythms were asystole 77.2% of the time, pulseless electrical activity 16.4% of the time, and ventricular fibrillation or ventricular tachycardia 4% of the time. Annual incidence was 9.1/100,000 children. CPA was witnessed in 34.0% of cases; 80.7% of these were bystander‐witnessed, and 18.1% were EMS‐witnessed. Primary pathogenic cause of arrest was medical in 61.2% of cases, trauma in 37.2% of cases, and indeterminate in 1.6% of cases. Initial underlying physiologic compromise of witnessed arrests was judged to be respiratory in 39.8% of cases, sudden collapse (presumed electrical) in 16.4% of cases, progressive shock in 1.2% of cases, and indeterminate in 42.6% of cases. Presumed etiology was trauma, 37.6%; sudden infant death syndrome (SIDS), 20.3%; and respiratory disease, 11.6%, most commonly. Survival to hospital discharge was 2.0%. Conclusions: This is one of the largest population‐based, prospective cohorts of pediatric CPA reported to date, and it reveals that most pediatric arrests are unwitnessed and receive no bystander CPR. Those that are witnessed most often are caused by respiratory arrests or trauma. Trauma, SIDS, and respiratory disease are the most common etiologies overall. These data are vital to planning large resuscitation trials looking at specific interventions (i.e., increasing bystander CPR) and highlight the need for better strategies for prevention and early recognition.  相似文献   
93.
为了探讨医院制剂室的软件管理 ,我们根据《医疗机构制剂配制质量管理规范》的要求 ,分析了我们的软件动态与静态资料 ,提出了自己的一些解决方案。  相似文献   
94.
目的:通过对医院平均住院日情况的简要分析,以探索缩短平均住院日的有效途径。方法:从统计室提取数据,与病案核对,计算相对指标。结果:我院的平均住院日呈下降趋势,但与卫生部颁布的标准还有差距,中医各科和康复科科别的平均住院日更长一些。结论:我院的平均住院日还有潜力可挖,术前住院日多数病种都较长,应在医疗质量和护理质量上狠下功夫,加强科室间的协作,降低平均住院日,减少无效住院日。  相似文献   
95.
应用计算机网络系统提高门急诊管理水平   总被引:3,自引:0,他引:3  
作者介绍的门急诊计算机管理网络系统,应用软件使用FOXPRO2.5FORDOS语言,在两台网络服务器之间应用镜像技术,门诊号的录入使用光笔和条形码技术,实行划价、收费一体化,采用星型拓扑网络结构,保证了网络的先进性、安全性、稳定性和可扩充性。网络系统实现挂号、划价收费、调剂、药品使用管理、工作量统计及经济核算的全程闭环管理格局,有效地堵塞了管理和经济上的漏洞,提高了工作效率和管理水平。该系统已正常运行了12个月,并通过省级科技成果鉴定。  相似文献   
96.
论述了医院组建放射治疗科室进行可行性分析时应考虑的因素,从技术设施、诊疗室与住院病房等方面介绍了放射治疗科的基本组建要求。  相似文献   
97.
98.
99.
The potential for morbidity and mortality in patients who have PID with febrile and nonfebrile illness is extremely high. Familiarity with the clinical manifestations of PID and collaboration with a pediatric immunologist are prerequisites for optimal short-term care of these complex patients. Conservative management with empiric broad-spectrum antimicrobials, early and aggressive surgical debridement of abscesses, and admission at a tertiary pediatric care center are often indicated.  相似文献   
100.
The announcement of the National Heart Attack Alert Program by the National Heart, Lung and Blood Institute in June of 1991 prompted leaders of the Florida Chapter of the American College of Cardiology to develop a statewide program to reduce the morbidity and mortality from acute myocardial infarctions within Florida. It became apparent that the success of such a program would require the prompt institution of thrombolytic agents or other revascular-ization procedures in appropriate patients. No longer could the decision regarding institution of therapy await discussion by telephone and/or the arrival at the emergency department (ED) of the patient's primary care physician or cardiologist. Efforts to establish appropriate protocols for therapy revealed that many of the 25,000 or more physicians currently staffing the 5,600 or so EDs in this country were moonlighting residents or practitioners from a variety of specialties or subspe-cialties with limited or no formal EM training. Furthermore, it was learned that there were in the entire country only about 800 postgraduate, year-one Council for Graduate Medical Education accredited training positions. There were only 21 such training positions in the entire state of Florida. The reasons for these deficiencies are discussed and a challenge to correct this person power crisis is issued, not principally to the leadership of EM, but to the entire medical profession.  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