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   1357272篇
  免费   116141篇
  国内免费   6422篇
耳鼻咽喉   16858篇
儿科学   43712篇
妇产科学   37106篇
基础医学   186922篇
口腔科学   36690篇
临床医学   123892篇
内科学   281807篇
皮肤病学   32276篇
神经病学   112793篇
特种医学   56006篇
外国民族医学   274篇
外科学   212005篇
综合类   31663篇
现状与发展   2篇
一般理论   437篇
预防医学   109055篇
眼科学   28452篇
药学   95325篇
  6篇
中国医学   2278篇
肿瘤学   72276篇
  2018年   14065篇
  2017年   11131篇
  2016年   13331篇
  2015年   14999篇
  2014年   20734篇
  2013年   31024篇
  2012年   38029篇
  2011年   40808篇
  2010年   25376篇
  2009年   24874篇
  2008年   37961篇
  2007年   40419篇
  2006年   41493篇
  2005年   39976篇
  2004年   38135篇
  2003年   37123篇
  2002年   34971篇
  2001年   66192篇
  2000年   68020篇
  1999年   56733篇
  1998年   16911篇
  1997年   15161篇
  1996年   16145篇
  1995年   16326篇
  1994年   15197篇
  1993年   14247篇
  1992年   47156篇
  1991年   45818篇
  1990年   44029篇
  1989年   41877篇
  1988年   38795篇
  1987年   38119篇
  1986年   35896篇
  1985年   34670篇
  1984年   26420篇
  1983年   22166篇
  1982年   13909篇
  1981年   12450篇
  1980年   11711篇
  1979年   23532篇
  1978年   17038篇
  1977年   14356篇
  1976年   13160篇
  1975年   13712篇
  1974年   16085篇
  1973年   15393篇
  1972年   14178篇
  1971年   13032篇
  1970年   11867篇
  1969年   11092篇
排序方式: 共有10000条查询结果,搜索用时 296 毫秒
51.
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   
52.
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   
53.
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   
54.
55.
Behçet disease is a complex, multisystem disease characterized by recurrent oral and genital ulcerations. It rarely occurs in infants or children. Neonatal Behçet disease has been reported in infants whose ulcers resolve at or before 9 weeks of age. Few cases of neonatal Behçet disease persisting into childhood have previously been reported. We report the case of a 1‐month‐old infant who presented with severe recurrent genital ulcerations and at 6 months developed recurrent oral ulcerations. Her orogenital ulcerations continue to recur. Human leukocyte antigen testing revealed HLA‐B51 and B44 positivity. This is a case of pediatric Behçet disease in the neonatal period. Behçet disease should be considered in the differential diagnosis of recurrent genital and oral ulcerations in infants and children.  相似文献   
56.
57.
58.
59.
60.
Preimplantation genetic diagnosis (PGD) was originally developed to diagnose embryo-related genetic abnormalities for couples who present a high risk of a specific inherited disorder. Because this technology involves embryo selection, the medical, bioethical, and legal implications of the technique have been debated, particularly when it is used to select features that are not related to serious diseases. Although several initiatives have attempted to achieve regulatory harmonization, the diversity of healthcare services available and the presence of cultural differences have hampered attempts to achieve this goal. Thus, in different countries, the provision of PGD and regulatory frameworks reflect the perceptions of scientific groups, legislators, and society regarding this technology. In Brazil, several texts have been analyzed by the National Congress to regulate the use of assisted reproduction technologies. Legislative debates, however, are not conclusive, and limited information has been published on how PGD is specifically regulated. The country requires the development of new regulatory standards to ensure adequate access to this technology and to guarantee its safe practice. This study examined official documents published on PGD regulation in Brazil and demonstrated how little direct oversight of PGD currently exists. It provides relevant information to encourage reflection on a particular regulation model in a Brazilian context, and should serve as part of the basis to enable further reform of the clinical practice of PGD in the country.  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