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   1337497篇
  免费   114777篇
  国内免费   6372篇
耳鼻咽喉   16721篇
儿科学   43058篇
妇产科学   36633篇
基础医学   183862篇
口腔科学   36356篇
临床医学   120732篇
内科学   278652篇
皮肤病学   31925篇
神经病学   110573篇
特种医学   55583篇
外国民族医学   276篇
外科学   210623篇
综合类   31566篇
现状与发展   2篇
一般理论   415篇
预防医学   106651篇
眼科学   28083篇
药学   93822篇
  5篇
中国医学   2234篇
肿瘤学   70874篇
  2018年   13413篇
  2017年   10660篇
  2016年   12828篇
  2015年   14337篇
  2014年   20004篇
  2013年   29802篇
  2012年   36344篇
  2011年   39007篇
  2010年   24449篇
  2009年   23965篇
  2008年   36479篇
  2007年   38865篇
  2006年   39997篇
  2005年   38574篇
  2004年   36810篇
  2003年   35898篇
  2002年   33911篇
  2001年   66091篇
  2000年   67974篇
  1999年   56624篇
  1998年   16747篇
  1997年   15030篇
  1996年   16024篇
  1995年   16242篇
  1994年   15123篇
  1993年   14175篇
  1992年   47117篇
  1991年   45770篇
  1990年   43986篇
  1989年   41839篇
  1988年   38772篇
  1987年   38095篇
  1986年   35876篇
  1985年   34649篇
  1984年   26367篇
  1983年   22118篇
  1982年   13857篇
  1981年   12449篇
  1980年   11725篇
  1979年   23557篇
  1978年   17088篇
  1977年   14401篇
  1976年   13188篇
  1975年   13735篇
  1974年   16112篇
  1973年   15418篇
  1972年   14186篇
  1971年   13043篇
  1970年   11891篇
  1969年   11112篇
排序方式: 共有10000条查询结果,搜索用时 578 毫秒
41.
Pediatric trachyonychia is an acquired nail disease that can cause distress to families. It is a poorly understood disease, and long‐term follow‐up data are lacking. We present an institutional review of 11 children with isolated pediatric trachyonychia followed over time. Children with the diagnosis of pediatric trachyonychia were identified and invited to participate. Pictures were taken on follow‐up and a questionnaire was answered. Exclusion criteria include having another diagnosis at the initial visit that causes nail dystrophy. Eleven patients with the diagnosis of pediatric trachyonychia were available for follow‐up. The mean age of appearance was 2.7 years (range 2–7 yrs) and the average follow‐up was 66 months (range 10–126 mos). Nine patients were treated with potent topical corticosteroids, one used only petrolatum, and one took vitamin supplements. One patient was found to have an additional skin and hair diagnosis of alopecia areata on follow‐up. On follow‐up, 82% noted improvement of the nails, whereas 18% noted no change. A majority of cases of pediatric trachyonychia are isolated and improve with time, regardless of treatment.  相似文献   
42.
Sinus venosus atrial septal defect (SV‐ASD) usually coexists with partial anomalous pulmonary vein connection (PAPVC). It is a difficult diagnosis in transthoracic echocardiography (TTE) due to eccentric position of defects. We present a rare case of atypical anatomical variation in PAPVC, which was never described before. Two right pulmonary veins drained into superior vena cava, which overrode SV‐ASD and interatrial septum, a third pulmonary vein into the right atrium. Complete diagnosis could not be set after TTE, nor transesophageal echocardiography, whereas angio‐CT was finally conclusive. This diagnostic approach allowed the surgical planning.  相似文献   
43.
44.
45.
46.
47.
48.
49.
The current situation in which the humanities are disparaged affects all university disciplines, including nursing, in whose historical evolution the humanities have always been present in one form or another. Looking beyond this disrepute, this study proposes that nursing renew its attention to classical philosophy. Specifically, it invites a close reading of Xenophon's Anabasis and Plato's Meno, to get three related goals: to show how the use of ancient texts are very valuable tools for the philosophical initiation of nursing students and can help them reflect on their choice of nursing as a practical activity; to reflect on the problem of virtue and the nature of the good life; and to show how the interaction with ancient texts allows students to reflect on questions and issues of life, theirs and others, that are not open to investigation through a purely scientific method. Consequently, both Anabasis and Meno readings strengthen the intellectual relationship between philosophy and nursing, enabling the latter to delve deeper into the key questions of its own thought as a discipline.  相似文献   
50.
Obesity Surgery - Laparoscopic sleeve gastrectomy (LSG) is increasingly playing a key role in obesity management. Such operations, however, carry complications sometimes including leaks. The...  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