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   105112篇
  免费   11047篇
  国内免费   1376篇
耳鼻咽喉   269篇
儿科学   3797篇
妇产科学   2145篇
基础医学   5327篇
口腔科学   1830篇
临床医学   26888篇
内科学   13143篇
皮肤病学   793篇
神经病学   3252篇
特种医学   1265篇
外国民族医学   1篇
外科学   17247篇
综合类   9811篇
现状与发展   2篇
一般理论   66篇
预防医学   17098篇
眼科学   310篇
药学   7473篇
  134篇
中国医学   3492篇
肿瘤学   3192篇
  2024年   283篇
  2023年   3314篇
  2022年   4009篇
  2021年   6387篇
  2020年   6110篇
  2019年   6154篇
  2018年   5691篇
  2017年   5195篇
  2016年   4819篇
  2015年   4670篇
  2014年   8090篇
  2013年   8891篇
  2012年   5874篇
  2011年   6167篇
  2010年   4707篇
  2009年   4672篇
  2008年   4406篇
  2007年   4429篇
  2006年   3827篇
  2005年   3211篇
  2004年   2707篇
  2003年   2149篇
  2002年   1688篇
  2001年   1545篇
  2000年   1249篇
  1999年   1066篇
  1998年   893篇
  1997年   710篇
  1996年   672篇
  1995年   522篇
  1994年   487篇
  1993年   419篇
  1992年   342篇
  1991年   314篇
  1990年   258篇
  1989年   226篇
  1988年   172篇
  1987年   174篇
  1986年   136篇
  1985年   156篇
  1984年   146篇
  1983年   87篇
  1982年   96篇
  1981年   86篇
  1980年   65篇
  1979年   66篇
  1978年   44篇
  1977年   43篇
  1976年   34篇
  1975年   27篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
73.
Conducting high-quality clinical research is dependent on merging scientific rigor with the clinical environment. This is often a complex endeavor that may include numerous barriers and competing interests. Overcoming these challenges and successfully integrating clinical research programs into clinical practice settings serving rehabilitation outpatients is beneficial from both a logistical perspective (eg, supports efficient and successful research procedures) and the establishment of a truly patient-centered research approach. Leveraging our experience with navigating this research-clinical care relationship, this article (1) proposes the Patient-Centered Framework for Rehabilitation Research, a model for integrating patient-centered research in an outpatient clinical setting that incorporates a collaborative, team-based model encompassing patient-centered values, as well as strategies for recruitment and retention, with a focus on populations living with disabilities or chronic diseases; (2) describes application of this framework in a comprehensive specialty multiple sclerosis center with both general strategies and specific examples to guide adaptation and implementation in other settings; and (3) discusses the effect of the framework as a model in 1 center, as well as the need for additional investigation and adaptation for other populations. The 5 interconnected principles incorporated in the Framework and which prioritize patient-centeredness include identifying shared values, partnering with the clinical setting, engaging with the population, building relationships with individuals, and designing accessible procedures. The Patient-Centered Framework for Rehabilitation Research is a model presented as an adaptable roadmap to guide researchers in hopes of not only improving individual patients’ experiences but also the quality and relevance of rehabilitation research as a whole. Future investigation is needed to test the Framework in other settings.  相似文献   
74.
75.
76.
慢性肾脏病是一种以肾脏功能的损伤为主要表现,并可累及全身多脏器的慢性进展性疾病。中医辨证治疗本病在延缓病情、改善预后等方面具有显著的优势。通过中医理论研究及临床经验总结,笔者提出从“肾毒”论治慢性肾脏病,认为其不仅是本病的致病因素,更是重要的病理产物,是本病发生发展、迁延难愈的关键。在治疗上提出以“益肾元、解肾毒”为大法,并根据不同兼夹辨证施治,采用药对,长治缓图。以“肾毒”立论拟定的经验方苏茵解毒方,在临床治疗和实验研究上均显示出明显的效果,并已制备成院内制剂临床使用,在疗效及经济效益方面均具有显著的优势。  相似文献   
77.
《Pancreatology》2022,22(5):665-670
Background and objectivesHyperlipasemia is highly prevalent among coronavirus disease 2019 (COVID-19) patients. The aim of this study was to assess the effect of lipase activity, measured at the time of admission, on the clinical course and mortality in COVID-19 patients.MethodsThe population of this study comprised 12,139 patients who were hospitalized due to COVID-19 between June 2020 and June 2021 in a pandemic hospital. Of these, 8819 patients were excluded from the study due to missing data, four patients were excluded due to a diagnosis of acute pancreatitis (according to the revised Atlanta criteria), and 72 patients were excluded due to alcohol use or having a history of chronic pancreatitis. The final study sample consisted of the remaining 3244 COVID-19 patients. Laboratory results, intensive care unit (ICU) follow-up periods, the need for mechanical ventilation, and mortality rates were compared between the normal lipase activity and high lipase activity groups.ResultsThere were 968 (29.8%) patients with high lipase activity at the time of admission. The rate of ICU admission was 36.1% vs. 9.9% (p < 0.001), mechanical ventilation requirement rates were 33.7% vs. 8.3% (p < 0.001), and mortality rates were as 24.6% vs. 6.4% (p < 0.001) in the high lipase activity group compared to the normal lipase activity group. Multivariate regression analysis revealed that high lipase activity was an independent factor in predicting mortality in hospitalized COVID-19 patients (odds ratio [OR]: 3.191, p < 0.001).ConclusionElevated lipase activity without acute pancreatitis at the time of admission in COVID-19 patients was determined as an independent predictor of poor prognosis.  相似文献   
78.
79.
80.
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