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   1509343篇
  免费   118023篇
  国内免费   6788篇
耳鼻咽喉   19147篇
儿科学   49668篇
妇产科学   42008篇
基础医学   205957篇
口腔科学   41607篇
临床医学   134313篇
内科学   309070篇
皮肤病学   35955篇
神经病学   120702篇
特种医学   64761篇
外国民族医学   370篇
外科学   236625篇
综合类   32553篇
现状与发展   2篇
一般理论   417篇
预防医学   121109篇
眼科学   32085篇
药学   105654篇
  7篇
中国医学   2350篇
肿瘤学   79794篇
  2018年   16576篇
  2017年   14212篇
  2016年   15730篇
  2015年   18769篇
  2014年   23895篇
  2013年   32854篇
  2012年   45277篇
  2011年   43137篇
  2010年   26365篇
  2009年   27394篇
  2008年   38236篇
  2007年   41323篇
  2006年   42669篇
  2005年   48844篇
  2004年   48537篇
  2003年   43383篇
  2002年   36940篇
  2001年   69645篇
  2000年   69329篇
  1999年   61358篇
  1998年   17176篇
  1997年   15238篇
  1996年   16314篇
  1995年   16542篇
  1994年   15389篇
  1993年   14379篇
  1992年   52953篇
  1991年   51828篇
  1990年   50236篇
  1989年   47771篇
  1988年   44312篇
  1987年   43520篇
  1986年   41007篇
  1985年   39197篇
  1984年   29464篇
  1983年   24634篇
  1982年   14726篇
  1981年   13116篇
  1980年   12455篇
  1979年   26920篇
  1978年   19111篇
  1977年   15954篇
  1976年   14525篇
  1975年   15858篇
  1974年   18812篇
  1973年   17790篇
  1972年   16578篇
  1971年   15425篇
  1970年   14180篇
  1969年   13255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.
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   
49.
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   
50.
Lasers in Medical Science - Studies reported the harmful effects of 2,4-D on body tissues, provoking changes in the anatomy and physiology of the kidneys, liver, and testicles. Thus, the objective...  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