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   296128篇
  免费   27105篇
  国内免费   5026篇
耳鼻咽喉   3629篇
儿科学   10114篇
妇产科学   5769篇
基础医学   22601篇
口腔科学   11440篇
临床医学   34993篇
内科学   26812篇
皮肤病学   3048篇
神经病学   15877篇
特种医学   6499篇
外国民族医学   12篇
外科学   23463篇
综合类   41302篇
现状与发展   12篇
一般理论   109篇
预防医学   59295篇
眼科学   2323篇
药学   23238篇
  391篇
中国医学   26567篇
肿瘤学   10765篇
  2024年   742篇
  2023年   6420篇
  2022年   8601篇
  2021年   14905篇
  2020年   14791篇
  2019年   15919篇
  2018年   14081篇
  2017年   12617篇
  2016年   11637篇
  2015年   10963篇
  2014年   19884篇
  2013年   22165篇
  2012年   17845篇
  2011年   19170篇
  2010年   15074篇
  2009年   13662篇
  2008年   12865篇
  2007年   13105篇
  2006年   11312篇
  2005年   9239篇
  2004年   7722篇
  2003年   6819篇
  2002年   5257篇
  2001年   4563篇
  2000年   4011篇
  1999年   3149篇
  1998年   2563篇
  1997年   2246篇
  1996年   1809篇
  1995年   1642篇
  1994年   1479篇
  1993年   1356篇
  1992年   1181篇
  1991年   1084篇
  1990年   941篇
  1989年   871篇
  1988年   851篇
  1987年   717篇
  1986年   655篇
  1985年   1926篇
  1984年   2155篇
  1983年   1366篇
  1982年   1797篇
  1981年   1244篇
  1980年   1085篇
  1979年   951篇
  1978年   790篇
  1977年   606篇
  1976年   741篇
  1975年   520篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
93.
94.
95.
96.
97.
目的探讨中西医结合护理改善老年高血压患者心理状态及生活质量的效果。方法在医院2018年1月—2018年6月就诊的老年高血压患者中选出60例,按照随机数字法的原则,分成研究组(n=30)和参考组(n=30)。参考组采用单一西医护理,研究组在此之外联合中医护理,比较两组患者的临床疗效。结果入院时研究组与参考组SAS、SDS、SF-6评分差异不显著(P>0.05),护理后1月、3月与参考组相比,研究组SAS、SDS评分显著降低(P<0.05),SF-6评分显著升高(P<0.05);研究组患者对中西结合护理满意度为96.67%,参考组患者对西医护理满意度为73.33%,研究组满意度较参考组高,差异显著(P<0.05)。结论中西医结合护理能够有效改善老年高血压患者的心理状态,提高生活质量。  相似文献   
98.
David Marr's three-level method for completely understanding a cognitive system and the importance he attaches to the computational level are so familiar as to scarcely need repeating. Fewer seem to recognize that Marr defends his famous method by criticizing the “reductionistic approach.” This sets up a more interesting relationship between Marr and reductionism than is usually acknowledged. I argue that Marr was correct in his criticism of the reductionists of his time—they were only describing (cellular activity), not explaining (cognitive functions). But a careful metascientific account of reductionistic neuroscience over the past two decades reveals that Marr's criticisms no longer have force. Contemporary neuroscience now explains cognition directly, although in a fashion—causal-mechanistically—quite different than Marr recommended. So while Marr was correct to reject the reductionism of his day and offer an alternative method for genuinely explaining cognition, contemporary cognitive scientists now owe us a new defense of Marr's famous method and the advantages of its explanations over the type now pursued successfully in current reductionist neuroscience. There are familiar reasons for thinking that this debt will not be paid easily.  相似文献   
99.
In the growing number of publications in medical anthropology about sub-Saharan Africa, there is a tendency to tell a single story of medicine, health, and health-seeking behavior. The heavy reliance on telling this singular story means that there is very little exposure to other stories. In this article, I draw on five books published in the past five years to illustrate the various components that make up this dominant narrative. I then provide examples of two accounts about medicine, health, and health-seeking behavior in Africa that deviate from this dominant narrative, in order to show the themes that alternative accounts have foregrounded. Ultimately, I make a plea to medical anthropologists to be mindful of the existence of this singular story and to resist the tendency to use its components as scaffolding in their accounts of medicine, health, and health-seeking behavior in Africa.  相似文献   
100.
Background and aimsWorldwide the COVID-19 pandemic has accelerated sufferings of mental health and behaviour attitudes of people. Many countries, including Bangladesh, reported suicide as extreme consequences of the psychological burden influenced by COVID-19. The present study explores human stress and its factor influenced by COVID-19 in Bangladesh, which significantly affect the quality of life.MethodsAn online-based questionnaire survey was conducted among 651 adult Bangladeshi populations by capturing socio-demographic information, possible human stress, and consequences of the pandemic. A set of statistical tools such as Pearson's Correlation Matrix (PCM), T-test, Principal Component Analysis (PCA) and Hierarchical Cluster Analysis (HCA) were applied to identify the relationship between different factors and influential factors increasing human stress.ResultsMore than 83% of the participants are facing COVID-19 related mental stress, which results in short temper, sleep disorder, and family chaos. PCA and HCA outcomes indicated a significant relationship between the respondents' opinions and human stress factors, which harmonized with the country's existing scenario. PCM results enlighten the relationship between human stress factors and found financial hardship, cutting back daily spending, and food crisis are interconnected together causes stress. Also, hampering students' formal education and future career plans significantly contribute to mental stress.ConclusionBased on the above findings, it's crucial to introduce a time-oriented strategy and implement precaution monitoring plans for Bangladesh. The rescue plan will help people to manage the pandemic and improve mental health to fight against psychological challenges related to COVID-19 and future pandemics.  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