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   4239793篇
  免费   352428篇
  国内免费   14047篇
耳鼻咽喉   59373篇
儿科学   135427篇
妇产科学   111206篇
基础医学   651284篇
口腔科学   115650篇
临床医学   394610篇
内科学   766066篇
皮肤病学   107730篇
神经病学   354079篇
特种医学   164558篇
外国民族医学   503篇
外科学   653111篇
综合类   119240篇
现状与发展   58篇
一般理论   2562篇
预防医学   357166篇
眼科学   100135篇
药学   294564篇
  26篇
中国医学   11299篇
肿瘤学   207621篇
  2021年   56490篇
  2020年   37508篇
  2019年   58967篇
  2018年   76521篇
  2017年   59551篇
  2016年   65673篇
  2015年   78658篇
  2014年   113818篇
  2013年   179265篇
  2012年   121715篇
  2011年   127172篇
  2010年   127789篇
  2009年   130019篇
  2008年   113481篇
  2007年   120383篇
  2006年   129513篇
  2005年   124252篇
  2004年   124283篇
  2003年   114667篇
  2002年   103831篇
  2001年   150280篇
  2000年   144850篇
  1999年   134843篇
  1998年   70880篇
  1997年   66826篇
  1996年   64965篇
  1995年   60127篇
  1994年   54034篇
  1993年   50293篇
  1992年   96220篇
  1991年   92792篇
  1990年   89199篇
  1989年   86897篇
  1988年   80092篇
  1987年   78579篇
  1986年   73907篇
  1985年   73017篇
  1984年   61694篇
  1983年   55465篇
  1982年   46045篇
  1981年   43142篇
  1980年   40516篇
  1979年   53103篇
  1978年   44039篇
  1977年   38894篇
  1976年   36275篇
  1975年   36276篇
  1974年   39409篇
  1973年   37633篇
  1972年   35247篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
103.
104.
Although depression is associated to physical discomfort, meanings of the body in depression are rarely addressed in clinical research. Drawing on the concept of the lived body, this study explores depression as an embodied phenomenon. Using a hermeneutic phenomenological approach, the analysis of narrative‐based interviews with 11 depressed adults discloses a thematic structure of an embodied process of an ambiguous striving against fading. Five subthemes elicit different dimensions of this process, interpreted as disabling or enabling: feeling estranged, feeling confined, feeling burdensome, sensing life and seeking belongingness. In relation to clinical practice, we suggest that the interdisciplinary team can focus on enhancing the enabling dimensions, for example through guided physical activities to support the patient to feel more alive, capable and connected. Moreover, we suggest that the treatment process benefits from an increased awareness of the ambiguity in the patient's struggle, acknowledging both destructive and recharging elements of the withdrawing, and the perceived conflict in‐between.  相似文献   
105.
106.
107.
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   
108.
There is a sharp difference in how one views TCR structure–function–behaviour dependent on whether its recognition of major histocompatibility complex‐encoded restriction elements (R) is germline selected or somatically generated. The generally accepted or Standard model is built on the assumption that recognition of R is by the V regions of the αβ TCR, which is not driven by allele specificity, whereas the competing model posits that recognition of R is allele‐specific. The establishing of allele‐specific recognition of R by the TCR would rule out the Standard model and clear the road to a consideration of a competing construct, the Tritope model. Here, the case for allele‐specific recognition (germline selected) is detailed making it obvious that the Standard model is untenable.  相似文献   
109.
110.
Krishna S. Iyer 《Platelets》2020,31(4):474-482
Abstract

Platelets are small, anucleated effector cells that play an important role in linking the hemostatic and inflammatory processes in the body. Platelet function is known to be altered under various inflammatory conditions including aging. A gain in platelet function during aging can increase the risk of thrombotic events, such as stroke and acute myocardial infarction. Anti-platelet therapy is designed to reduce risk of serious cerebrovascular and cardiovascular events, but the adverse consequences of therapy, such as risk for bleeding increases with aging as well. Age-associated comorbidities such as obesity, diabetes, and hyperlipidemia also contribute to increased platelet activity and thus can enhance the risk of thrombosis. Therefore, identification of unique mechanisms of platelet dysfunction in aging and in age-associated comorbidities is warranted to design novel antiplatelet drugs. This review outlines some of the current areas of research on aging-related mechanisms of platelet hyperactivity and addresses the clinical urgency for designing anti-platelet therapies toward novel molecular targets in the aging population.  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