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   1340892篇
  免费   114932篇
  国内免费   6380篇
耳鼻咽喉   16768篇
儿科学   43293篇
妇产科学   36620篇
基础医学   184248篇
口腔科学   36403篇
临床医学   120907篇
内科学   279434篇
皮肤病学   32076篇
神经病学   110721篇
特种医学   55689篇
外国民族医学   274篇
外科学   211066篇
综合类   31698篇
现状与发展   2篇
一般理论   417篇
预防医学   106829篇
眼科学   28336篇
药学   94025篇
  5篇
中国医学   2258篇
肿瘤学   71135篇
  2018年   13506篇
  2017年   10731篇
  2016年   12919篇
  2015年   14452篇
  2014年   20156篇
  2013年   29973篇
  2012年   36621篇
  2011年   39288篇
  2010年   24577篇
  2009年   24077篇
  2008年   36661篇
  2007年   39100篇
  2006年   40206篇
  2005年   38744篇
  2004年   36956篇
  2003年   36022篇
  2002年   34042篇
  2001年   66137篇
  2000年   68021篇
  1999年   56665篇
  1998年   16776篇
  1997年   15052篇
  1996年   16041篇
  1995年   16261篇
  1994年   15108篇
  1993年   14175篇
  1992年   47161篇
  1991年   45800篇
  1990年   44028篇
  1989年   41870篇
  1988年   38796篇
  1987年   38123篇
  1986年   35903篇
  1985年   34684篇
  1984年   26394篇
  1983年   22129篇
  1982年   13854篇
  1981年   12463篇
  1980年   11731篇
  1979年   23564篇
  1978年   17091篇
  1977年   14391篇
  1976年   13188篇
  1975年   13733篇
  1974年   16101篇
  1973年   15406篇
  1972年   14175篇
  1971年   13041篇
  1970年   11883篇
  1969年   11107篇
排序方式: 共有10000条查询结果,搜索用时 296 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