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   193820篇
  免费   35761篇
  国内免费   2491篇
耳鼻咽喉   5489篇
儿科学   6862篇
妇产科学   3583篇
基础医学   9734篇
口腔科学   2257篇
临床医学   32591篇
内科学   55689篇
皮肤病学   8253篇
神经病学   19451篇
特种医学   7473篇
外国民族医学   8篇
外科学   45318篇
综合类   729篇
现状与发展   73篇
一般理论   33篇
预防医学   11450篇
眼科学   4179篇
药学   3939篇
中国医学   51篇
肿瘤学   14910篇
  2024年   528篇
  2023年   4991篇
  2022年   1320篇
  2021年   4055篇
  2020年   6600篇
  2019年   3196篇
  2018年   8536篇
  2017年   8215篇
  2016年   9361篇
  2015年   9420篇
  2014年   16876篇
  2013年   17541篇
  2012年   8650篇
  2011年   8764篇
  2010年   12040篇
  2009年   15727篇
  2008年   8542篇
  2007年   6906篇
  2006年   9147篇
  2005年   6507篇
  2004年   5558篇
  2003年   4357篇
  2002年   4278篇
  2001年   4440篇
  2000年   3496篇
  1999年   3859篇
  1998年   4105篇
  1997年   3860篇
  1996年   3680篇
  1995年   3515篇
  1994年   2233篇
  1993年   1814篇
  1992年   1784篇
  1991年   1812篇
  1990年   1442篇
  1989年   1559篇
  1988年   1316篇
  1987年   1151篇
  1986年   1184篇
  1985年   1013篇
  1984年   801篇
  1983年   715篇
  1982年   660篇
  1981年   541篇
  1980年   500篇
  1979年   550篇
  1978年   502篇
  1977年   571篇
  1975年   439篇
  1972年   451篇
排序方式: 共有10000条查询结果,搜索用时 109 毫秒
91.
92.
To increase the overall rate of breastfeeding initiation and duration, factors involved in a mother's decision to breastfeed must be identified. Self‐objectification in the context of breastfeeding was a concept selected for exploring factors associated with negative views of breastfeeding. A concept analysis following the eight‐step Walker & Avant method provides clarity and context to the concept of self‐objectification in the context of breastfeeding. The antecedents of self‐objectification in the context of breastfeeding include living in a culture of sexualization and objectification of women and the internalization of the values of objectification. Attributes of self‐objectification in the context of breastfeeding are a prioritization of physical appearance attributes of the breast over the health benefits of breastfeeding and a preoccupation with physical appearance. Consequences include negative views toward breastfeeding initiation, duration, and public breastfeeding. A concept analysis on self‐objectification in the context of breastfeeding will provide definition and clarity to this phenomenon, lend to theory and measurement, and add literature to the sociocultural factors impacting breastfeeding decisions.  相似文献   
93.
94.
95.
96.
97.
98.
99.
100.
Capillary malformation–arteriovenous malformation syndrome (CM‐AVM) is an autosomal dominant disorder caused by RASA1 mutations. The prevalence and phenotypic spectrum are unknown. Evaluation of patients with multiple CMs is challenging because associated AVMs can be life threatening. The objective of this study was to describe the clinical characteristics of children presenting with features of CM‐AVM to an academic pediatric dermatology practice. After institutional review board approval was received, a retrospective chart review was performed of patients presenting between 2009 and 2012 with features of CM‐AVM. We report nine cases. Presenting symptoms ranged from extensive vascular stains and cardiac failure to CMs noted incidentally during routine skin examination. All demonstrated multiple CMs, two had Parkes Weber syndrome, and two had multiple infantile hemangiomas. Seven patients had family histories of multiple CMs; three had family histories of large, atypical CMs. Six had personal or family histories of AVMs. Genetic evaluation was recommended for all and was pursued by six families; four RASA1 mutations were identified, including one de novo. Consultations with neurology, cardiology, and orthopedics were recommended. Most patients (89%) have not required treatment to date. CM‐AVM is an underrecognized condition with a wide clinical spectrum that often presents in childhood. Further evaluation may be indicated in patients with multiple CMs. This study is limited by its small and retrospective nature.  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