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   22113篇
  免费   2153篇
  国内免费   512篇
耳鼻咽喉   103篇
儿科学   1839篇
妇产科学   62篇
基础医学   5128篇
口腔科学   66篇
临床医学   1694篇
内科学   5226篇
皮肤病学   85篇
神经病学   376篇
特种医学   233篇
外科学   321篇
综合类   3549篇
现状与发展   3篇
预防医学   1389篇
眼科学   174篇
药学   2512篇
  22篇
中国医学   1596篇
肿瘤学   400篇
  2024年   42篇
  2023年   245篇
  2022年   443篇
  2021年   816篇
  2020年   842篇
  2019年   771篇
  2018年   760篇
  2017年   819篇
  2016年   921篇
  2015年   892篇
  2014年   1331篇
  2013年   2537篇
  2012年   1326篇
  2011年   1366篇
  2010年   1013篇
  2009年   1001篇
  2008年   1017篇
  2007年   1155篇
  2006年   1053篇
  2005年   870篇
  2004年   728篇
  2003年   642篇
  2002年   587篇
  2001年   508篇
  2000年   406篇
  1999年   407篇
  1998年   323篇
  1997年   324篇
  1996年   248篇
  1995年   162篇
  1994年   168篇
  1993年   118篇
  1992年   104篇
  1991年   100篇
  1990年   112篇
  1989年   81篇
  1988年   77篇
  1987年   55篇
  1986年   75篇
  1985年   81篇
  1984年   43篇
  1983年   39篇
  1982年   32篇
  1981年   34篇
  1980年   34篇
  1979年   24篇
  1978年   15篇
  1977年   10篇
  1976年   9篇
  1975年   4篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
ABSTRACT

Introduction

‘Critical Asthma Syndrome’ (CAS) is an umbrella term proposed to include several forms of asthma, responsible for acute and life-threatening exacerbations. CAS requires urgent and adequate supportive and pharmacological treatments to prevent serious outcomes.  相似文献   
4.
陈玉琴 《中外医疗》2016,(26):169-171
目的:探讨分析补肾纳气法治疗小儿支气管哮喘的临床效果。方法方便选取该院儿科于2013年3月—2014年11月收治的小儿支气管哮喘患者67例,根据随机数字法分为对照组33例和观察组34例,对照组患者予以氨茶碱片治疗,观察组患者实施补肾纳气法治疗,观察两组患者的治疗效果,进行临床对照性分析。结果对照组患者不良反应发生率24.2%,观察组患者不良反应发生率5.8%,观察组不良反应发生率明显低于对照组(P﹤0.05);对照组患者总有效率60.6%,观察组患者总有效率85.3%。观察组患者治疗后总有效率明显高于对照组(P﹤0.05)。结论补肾纳气法治疗小儿支气管哮喘的临床效果好,应用价值高,值得在临床实践中推广应用。  相似文献   
5.
6.
目的探讨支气管哮喘患儿中性粒细胞胞外诱捕网水平与患者免疫功能及临床预后的关系。方法选取本院2017年9月-2018年9月支气管哮喘患者80例作为观察组,并以同期健康体检的30例儿童作为对照组,采用pico Green dsDNA荧光染色定量检测支气管哮喘患者NETs水平,采用T淋巴细胞亚群评价患者免疫功能,对比不同NETs水平患者免疫功能及临床特点,采用Logistic回归分析探讨小儿支气管哮喘急性发作的风险因素。结果观察组白细胞、中性粒细胞、单核细胞、Cf-DNA/NETs水平均高于对照组(P <0. 05),而淋巴细胞水平低于对照组,差异均有统计学意义(P <0. 05)。Logistic回归分析显示,哮喘家族史、呼吸道感染、Cf-DNA/NETs水平上升、有害气体接触、被动吸烟均是支气管哮喘急性发作的独立危险因素(P <0. 05)。结论中性粒细胞胞外诱捕网水平与支气管哮喘患者免疫功能及预后密切相关,值得临床重点关注。  相似文献   
7.
8.
Objective: Asthma disproportionately impacts and has poorer outcomes in low-income, minority, and inner-city children. The home environment has a profound impact on a child's asthma. Home-based asthma visits have the potential to positively impact a child's asthma, especially in targeted populations. The purpose of this integrative review is 1.) to explore the effectiveness of home-based education and environmental measures and 2.) to explore specific indicators and tools to measure pediatric asthma control and program effectiveness. Data Sources: Medline, CINHAL, and Ovid databases were searched from 2010 to 2017 utilizing the keywords healthy homes AND asthma and home based interventions AND asthma. Study Selections: A total of 71 articles were retrieved of which 27 articles met the inclusion criteria of English language, human subjects, and the inclusion of pediatric populations. Three additional articles were hand-searched from previous references. In total, 30 articles were reviewed. A quality appraisal was conducted utilizing standardized appraisal tools. Results: Home-based asthma education and environmental interventions have proven to be effective. The programs reviewed varied in types of interventions, intensity and duration, the type of provider, length of follow-up, and outcome measures. Successful programs were patient-centered, included a home assessment and individualized education and interventions, and were collaborative. Multiple outcome indicators such as health care utilization, asthma control, missed days of school or productivity, asthma symptoms, and verification of environmental remediation have been utilized. Conclusion: Home-based asthma programs can be beneficial to children with poorly controlled asthma and have the potential to be cost-effective.  相似文献   
9.
10.
Objective: Despite its negative effects, smoking is more common among individuals with asthma compared to those without. Anxiety sensitivity (fear of arousal-related sensations) is associated with both smoking and asthma; however, no research, to date, has examined the interplay between these three factors. Thus, the purpose of the current study was to evaluate the mediating role of anxiety sensitivity in the association between asthma diagnosis and smoking status. Methods: The current study was a secondary analysis of data from three existing datasets of non-smokers and smokers with and without asthma (n?=?433; 56.3% female, Mage?=?34.01 years, SD?=?13.9). Participants provided information on their asthma diagnosis status and smoking status and completed self-report measures. Results: As hypothesized, after controlling for gender, race and age, there was a significant indirect effect of asthma diagnosis on smoking status through anxiety sensitivity (95% CI?=?0.07–0.48). Conclusions: These results indicate that the association between asthma diagnosis and smoking status appears to be driven, in part, by anxiety sensitivity and suggest that anxiety sensitivity may serve as an important target for prevention and intervention efforts for smokers with asthma.  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