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   140572篇
  免费   12476篇
  国内免费   8683篇
耳鼻咽喉   1383篇
儿科学   2021篇
妇产科学   2606篇
基础医学   15509篇
口腔科学   2615篇
临床医学   18856篇
内科学   20284篇
皮肤病学   1324篇
神经病学   6929篇
特种医学   4955篇
外国民族医学   44篇
外科学   14135篇
综合类   24358篇
现状与发展   39篇
一般理论   20篇
预防医学   9403篇
眼科学   3658篇
药学   14826篇
  107篇
中国医学   7752篇
肿瘤学   10907篇
  2024年   283篇
  2023年   1743篇
  2022年   3561篇
  2021年   6496篇
  2020年   4802篇
  2019年   4159篇
  2018年   4510篇
  2017年   4001篇
  2016年   3816篇
  2015年   5872篇
  2014年   7545篇
  2013年   7127篇
  2012年   10655篇
  2011年   11691篇
  2010年   7777篇
  2009年   6215篇
  2008年   7784篇
  2007年   8063篇
  2006年   7762篇
  2005年   7622篇
  2004年   5586篇
  2003年   5111篇
  2002年   4516篇
  2001年   3604篇
  2000年   3422篇
  1999年   3175篇
  1998年   1859篇
  1997年   1784篇
  1996年   1535篇
  1995年   1348篇
  1994年   1129篇
  1993年   714篇
  1992年   1074篇
  1991年   872篇
  1990年   721篇
  1989年   649篇
  1988年   623篇
  1987年   527篇
  1986年   431篇
  1985年   334篇
  1984年   211篇
  1983年   159篇
  1982年   85篇
  1981年   98篇
  1980年   84篇
  1979年   115篇
  1978年   53篇
  1977年   56篇
  1975年   44篇
  1974年   45篇
排序方式: 共有10000条查询结果,搜索用时 11 毫秒
61.
62.
To examine the knowledge level, behaviors, and psychological status of the Chinese population during the COVID-19 pandemic, and to explore the differences between urban and rural areas.We carried out a cross-sectional survey of the knowledge, behaviors related to COVID-19, and mental health in a probability sample of 3001 community residents in 30 provinces or districts across China from February 16–23, 2020. Convenience sampling and a snowball sampling were adopted. We used General Anxiety Disorder (GAD), the 9-item Patient Health Questionnaire (PHQ-9), and knowledge and behaviors questionnaire of community residents regarding COVID-19 designed by us to investigate the psychological status, disease-related knowledge, and the behavior of Chinese urban and rural residents during the pandemic.The average score of anxiety and depression among urban residents was 9.15 and 11.25, respectively, while the figures in rural areas were 8.69 and 10.57, respectively. There was a statistically significant difference in the levels of anxiety (P < .01) and depression (P < .01). Urban participants reported significantly higher levels of knowledge regarding COVID-19 in all aspects (transmission, prevention measures, symptoms of infection, treatment, and prognosis) (P < .01), compared to their rural counterparts. While a majority of respondents in urban areas obtained knowledge through WeChat, other apps, and the Internet (P < .01), residents in rural areas accessed information through interactions with the community (P < .01). Urban residents fared well in exchanging knowledge about COVID-19 and advising others to take preventive measures (P < .01), but fared poorly in advising people to visit a hospital if they displayed symptoms of the disease, compared to rural residents (P < .01). Regression analysis with behavior showed that being female (OR = 2.106, 95%CI = 1.259–3.522), aged 18 ≤ age < 65 (OR = 4.059, 95%CI = 2.166–7.607), being satisfied with the precautions taken by the community (OR = 2.594, 95%CI = 1.485–4.530), disinfecting public facilities in the community (OR = 2.342, 95%CI = 1.206–4.547), having knowledge of transmission modes (OR = 3.987, 95%CI: 2.039, 7.798), symptoms (OR = 2.045, 95%CI = 1.054–4.003), and outcomes (OR = 2.740, 95%CI = 1.513–4.962) of COVID-19, and not having anxiety symptoms (OR = 2.578, 95%CI = 1.127–5.901) were positively associated with affirmative behavior in urban areas. Being married (OR = 4.960, 95%CI = 2.608–9.434), being satisfied with the precautions taken by the community (OR = 2.484, 95%CI = 1.315–4.691), screening to ensure face mask wearing before entering the community (OR = 8.809, 95%CI = 2.649–19.294), and having knowledge about precautions (OR = 4.886, 95%CI = 2.604–9.167) and outcomes (OR = 2.657, 95%CI = 1.309–5.391) were positively associated with acceptable conduct in rural areas.The status of anxiety and depression among urban residents was more severe compared to those living in rural areas. There was a difference in being positively associated with constructive behaviors between rural and urban areas.  相似文献   
63.
64.
Abstract

Background

Comorbidities are commonly seen in patients with coronavirus disease 2019 (COVID-19), but the clinical implication is not yet well-delineated. We aim to characterize the prevalence and clinical implications of comorbidities in patients with COVID-19.  相似文献   
65.
从武汉抗疫中医药的投入使用情况,反思现代临床和国人所呈现出的中医药文化认同和就医习惯,探索其历史文化根源及社会因素与医学发展的内在关联。回顾历史,中医屡次临危受命,不负重托,如今大疫当前,中医药再次发挥了重要作用。故新时代探讨如何遵循中医药发展规律,传承精华、守正创新,坚持中医药原创优势,形成中医药学科优势整体化呈现的新模式医学,对提升全社会的中医药认知度具有重要意义。  相似文献   
66.
67.
68.
Canadian Journal of Anesthesia/Journal canadien d'anesthésie - To assess the management and safety of epidural or general anesthesia for Cesarean delivery in parturients with coronavirus...  相似文献   
69.
70.
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