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   9391篇
  免费   756篇
  国内免费   178篇
耳鼻咽喉   56篇
儿科学   182篇
妇产科学   131篇
基础医学   1001篇
口腔科学   229篇
临床医学   1235篇
内科学   1579篇
皮肤病学   85篇
神经病学   622篇
特种医学   261篇
外科学   838篇
综合类   872篇
一般理论   10篇
预防医学   1517篇
眼科学   103篇
药学   633篇
  3篇
中国医学   336篇
肿瘤学   632篇
  2024年   8篇
  2023年   239篇
  2022年   226篇
  2021年   474篇
  2020年   388篇
  2019年   433篇
  2018年   391篇
  2017年   364篇
  2016年   361篇
  2015年   367篇
  2014年   596篇
  2013年   842篇
  2012年   550篇
  2011年   555篇
  2010年   478篇
  2009年   430篇
  2008年   471篇
  2007年   400篇
  2006年   335篇
  2005年   274篇
  2004年   278篇
  2003年   237篇
  2002年   184篇
  2001年   178篇
  2000年   133篇
  1999年   110篇
  1998年   106篇
  1997年   96篇
  1996年   91篇
  1995年   81篇
  1994年   75篇
  1993年   46篇
  1992年   60篇
  1991年   47篇
  1990年   43篇
  1989年   42篇
  1988年   44篇
  1987年   34篇
  1986年   32篇
  1985年   37篇
  1984年   33篇
  1983年   28篇
  1982年   15篇
  1981年   22篇
  1980年   19篇
  1979年   16篇
  1978年   11篇
  1976年   12篇
  1974年   8篇
  1973年   6篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Management of colorectal cancer (CRC) was severely affected by the changes implemented during the pandemic, and this resulted in delayed elective presentation, increased emergency presentation, reduced screening and delayed definitive therapy. This review was conducted to analyze the impact of the coronavirus disease 2019 (COVID-19) pandemic on management of CRC and to identify the changes made in order to adapt to the pandemic. We performed a literature search in PubMed, Medline, Index Medicus, EMBASE, SCOPUS, Reference Citation Analysis (https://www.referencecitationanalysis.com/) and Google Scholar using the following keywords in various combinations: Colorectal cancer, elective surgery, emergency surgery, stage upgrading, screening, surveillance and the COVID-19 pandemic. Only studies published in English were included. To curtail the spread of COVID-19 infection, there were modifications made in the management of CRC. Screening was limited to high risk individuals, and the screening tests of choice during the pandemic were fecal occult blood test, fecal immunochemical test and stool DNA testing. The use of capsule colonoscopy and open access colonoscopy was also encouraged. Blood-based tests like serum methylated septin 9 were also encouraged for screening of CRC during the pandemic. The presentation of CRC was also affected by the pandemic with more patients presenting with emergencies like obstruction and perforation. Stage migration was also observed during the pandemic with more patients presenting with more advanced tumors. The operative therapy of CRC was altered by the pandemic as more emergencies surgeries were done, which may require exteriorization by stoma. This was to reduce the morbidity associated with anastomosis and encourage early discharge from the hospital. There was also an initial reduction in laparoscopic surgical procedures due to the fear of aerosols and COVID-19 infection. As we gradually come out of the pandemic, we should remember the lessons learned and continue to apply them even after the pandemic passes.  相似文献   
2.
The effects of climate change include floods, hurricanes, heat waves, and fires; these natural disasters can result in respiratory, cardiovascular, and psychological harm in older adults, who experience the highest morbidity and mortality during heat waves. Advanced practice registered nurses (APRNs) need education on preparing, assessing, and treating older adults for climate-change disasters, especially heat waves. This article will help APRNs understand the effects of climate-change events on the vulnerable older adults and advocates for the need to integrate health effects of climate change into curricula, practicums, policy, and research agendas.  相似文献   
3.
4.
5.
6.
7.
8.
The Earth’s mean surface temperature is already approximately 1.1°C higher than pre-industrial levels. Exceeding a mean 1.5°C rise by 2050 will make global adaptation to the consequences of climate change less possible. To protect public health, anaesthesia providers need to reduce the contribution their practice makes to global warming. We convened a Working Group of 45 anaesthesia providers with a recognised interest in sustainability, and used a three-stage modified Delphi consensus process to agree on principles of environmentally sustainable anaesthesia that are achievable worldwide. The Working Group agreed on the following three important underlying statements: patient safety should not be compromised by sustainable anaesthetic practices; high-, middle- and low-income countries should support each other appropriately in delivering sustainable healthcare (including anaesthesia); and healthcare systems should be mandated to reduce their contribution to global warming. We set out seven fundamental principles to guide anaesthesia providers in the move to environmentally sustainable practice, including: choice of medications and equipment; minimising waste and overuse of resources; and addressing environmental sustainability in anaesthetists’ education, research, quality improvement and local healthcare leadership activities. These changes are achievable with minimal material resource and financial investment, and should undergo re-evaluation and updates as better evidence is published. This paper discusses each principle individually, and directs readers towards further important references.  相似文献   
9.
Climate change education in advanced practice registered nursing curricula prepares nurse practitioners to respond to the health effects of climate change. Knowledge of the relationship between human and environmental health is essential for nurse practitioners to identify, teach, and respond to the health effects of climate change in clinical and community settings. This article describes a webinar hosted by the Sarah P. Duke Gardens in partnership with the Duke University School of Nursing. Our webinar provided an opportunity for attendees to understand how gardening can mitigate climate change, the important relationship between human and environmental health, and nurses’ role in climate crisis.  相似文献   
10.
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