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   1341999篇
  免费   115078篇
  国内免费   6365篇
耳鼻咽喉   16744篇
儿科学   43194篇
妇产科学   36687篇
基础医学   184271篇
口腔科学   36602篇
临床医学   121329篇
内科学   279448篇
皮肤病学   31945篇
神经病学   111040篇
特种医学   55769篇
外国民族医学   274篇
外科学   211130篇
综合类   31820篇
现状与发展   2篇
一般理论   424篇
预防医学   107281篇
眼科学   28201篇
药学   94003篇
  5篇
中国医学   2230篇
肿瘤学   71043篇
  2018年   13470篇
  2017年   10710篇
  2016年   12879篇
  2015年   14401篇
  2014年   20076篇
  2013年   29970篇
  2012年   36573篇
  2011年   39226篇
  2010年   24559篇
  2009年   24057篇
  2008年   36673篇
  2007年   39113篇
  2006年   40206篇
  2005年   38804篇
  2004年   37019篇
  2003年   36088篇
  2002年   34107篇
  2001年   66219篇
  2000年   68083篇
  1999年   56743篇
  1998年   16791篇
  1997年   15081篇
  1996年   16066篇
  1995年   16278篇
  1994年   15149篇
  1993年   14197篇
  1992年   47226篇
  1991年   45877篇
  1990年   44110篇
  1989年   41923篇
  1988年   38873篇
  1987年   38193篇
  1986年   35967篇
  1985年   34758篇
  1984年   26414篇
  1983年   22182篇
  1982年   13895篇
  1981年   12490篇
  1980年   11759篇
  1979年   23592篇
  1978年   17119篇
  1977年   14423篇
  1976年   13216篇
  1975年   13748篇
  1974年   16135篇
  1973年   15427篇
  1972年   14214篇
  1971年   13083篇
  1970年   11915篇
  1969年   11136篇
排序方式: 共有10000条查询结果,搜索用时 15 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