全文获取类型
收费全文 | 2618112篇 |
免费 | 221135篇 |
国内免费 | 24164篇 |
专业分类
耳鼻咽喉 | 36164篇 |
儿科学 | 74936篇 |
妇产科学 | 65740篇 |
基础医学 | 364364篇 |
口腔科学 | 71353篇 |
临床医学 | 251731篇 |
内科学 | 503524篇 |
皮肤病学 | 50008篇 |
神经病学 | 214525篇 |
特种医学 | 104959篇 |
外国民族医学 | 1084篇 |
外科学 | 383444篇 |
综合类 | 99304篇 |
现状与发展 | 75篇 |
一般理论 | 1001篇 |
预防医学 | 205703篇 |
眼科学 | 63344篇 |
药学 | 204085篇 |
303篇 | |
中国医学 | 19776篇 |
肿瘤学 | 147988篇 |
出版年
2021年 | 29712篇 |
2019年 | 26096篇 |
2018年 | 33358篇 |
2017年 | 26908篇 |
2016年 | 28215篇 |
2015年 | 34893篇 |
2014年 | 47770篇 |
2013年 | 62689篇 |
2012年 | 86334篇 |
2011年 | 92651篇 |
2010年 | 54903篇 |
2009年 | 50343篇 |
2008年 | 81190篇 |
2007年 | 85518篇 |
2006年 | 86774篇 |
2005年 | 85197篇 |
2004年 | 76950篇 |
2003年 | 74123篇 |
2002年 | 72178篇 |
2001年 | 117089篇 |
2000年 | 121919篇 |
1999年 | 104678篇 |
1998年 | 32270篇 |
1997年 | 30038篇 |
1996年 | 28989篇 |
1995年 | 28008篇 |
1994年 | 25958篇 |
1993年 | 23425篇 |
1992年 | 81296篇 |
1991年 | 77954篇 |
1990年 | 74909篇 |
1989年 | 71983篇 |
1988年 | 66805篇 |
1987年 | 65610篇 |
1986年 | 61945篇 |
1985年 | 58897篇 |
1984年 | 44495篇 |
1983年 | 37818篇 |
1982年 | 22966篇 |
1979年 | 41366篇 |
1978年 | 28985篇 |
1977年 | 24346篇 |
1976年 | 22832篇 |
1975年 | 23964篇 |
1974年 | 29638篇 |
1973年 | 28042篇 |
1972年 | 26226篇 |
1971年 | 24151篇 |
1970年 | 22752篇 |
1969年 | 21087篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
Tonya J.H. White 《Journal of the American Academy of Child and Adolescent Psychiatry》2019,58(11):1042-1050
42.
Jeffrey J. Silbiger 《Echocardiography (Mount Kisco, N.Y.)》2019,36(5):954-957
Secondary tricuspid regurgitation (TR) caused by right ventricular enlargement in the setting of left heart disease/pulmonary hypertension has been well described. In contrast, that associated with right atrial enlargement—atrial functional TR (AF‐TR)—remains largely underappreciated. AF‐TR most often occurs in the setting of lone atrial fibrillation, although it is also seen in its absence (idiopathic AF‐TR). Several recent studies have found that the prevalence, hemodynamic significance, and prognosis of AF‐TR are not inconsequential, suggesting increased physician awareness of this novel clinical entity is warranted. This article discusses the pathogenesis, echocardiographic findings, and treatment of this underappreciated cause of secondary TR. 相似文献
43.
44.
45.
Yan Gao Shi-Feng Chu Zhao Zhang Qi-Di Ai Cong-Yuan Xia Hui-Yong Huang 《Journal of Asian natural products research》2019,21(8):782-797
Inappropriate use of acetaminophen (APAP) can lead to morbidity and mortality secondary to hepatic necrosis. Ginsenoside Rg1 is a major active ingredient in processed Panax ginseng, which is proved to elicit biological effects. We hypothesized the beneficial effect of Rg1 on APAP-mediated hepatotoxicity was through Nrf2/ARE pathway. The study was conducted in cells and mice, comparing the actions of Rg1. Rg1 significantly improved cell survival rates and promoted the expression of antioxidant proteins. Meanwhile, Rg1 reduced the excessive ROS and the occurrence of cell apoptosis, which were related to Nrf2/ARE pathway. Expression of Nrf2 has a certain cell specificity.
46.
47.
48.
49.
50.
Alexander E. J. Trevatt David R. Thomson Robert Miller Matthew Colquhoun Akinyemi I. Idowu Shakeel Rahman 《Journal of plastic surgery and hand surgery》2019,53(2):97-104
Academic output is just one aspect of a successful career as a plastic surgeon. However, for those with a strong interest in academia, the academic output of a department will likely be a key factor when deciding how to rank jobs. The aim of this study was to quantify and rank the academic output of plastic surgery units across the UK and Ireland. The Institute for Scientific Information (ISI) Web of Science Bibliometric analysis tool was used to collate cumulative (1950–2016), 10 year (2006–2016) and 3 years (2013–2015) research output data for plastic surgery units in the UK and Ireland. Sixty-six plastic surgery units were identified. Departments were ranked for each time period according to the number of papers produced, number of citations (Nc) and h-index (a measure of the impact of scientific output). The top 3 departments for number of papers in the last 10 years were The Royal Free Hospital, London (226) Broomfield Hospital, Chelmsford (218), and Morriston Hospital and Swansea (188). The top 3 for h-number were The Royal Free Hospital (21) Wythenshawe Hospital, Manchester (18) and Morriston Hospital (17). Academic output varies across plastic surgery units in the UK and Ireland. A number of departments have consistently maintained high academic outputs across the years and will be of interest to surgeons hoping to pursue a career in academia. 相似文献