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   3318083篇
  免费   257130篇
  国内免费   6473篇
耳鼻咽喉   49883篇
儿科学   103593篇
妇产科学   91613篇
基础医学   463639篇
口腔科学   99154篇
临床医学   296239篇
内科学   641376篇
皮肤病学   71547篇
神经病学   275719篇
特种医学   133616篇
外国民族医学   1263篇
外科学   508243篇
综合类   78841篇
现状与发展   7篇
一般理论   1325篇
预防医学   255297篇
眼科学   80925篇
药学   249695篇
  6篇
中国医学   6469篇
肿瘤学   173236篇
  2018年   33488篇
  2016年   29260篇
  2015年   32990篇
  2014年   46512篇
  2013年   70773篇
  2012年   95107篇
  2011年   99894篇
  2010年   58929篇
  2009年   56372篇
  2008年   95446篇
  2007年   102430篇
  2006年   103329篇
  2005年   101334篇
  2004年   97483篇
  2003年   94420篇
  2002年   93104篇
  2001年   151914篇
  2000年   156797篇
  1999年   132506篇
  1998年   35867篇
  1997年   32299篇
  1996年   31446篇
  1995年   32219篇
  1994年   30212篇
  1993年   28080篇
  1992年   105665篇
  1991年   102075篇
  1990年   99090篇
  1989年   95841篇
  1988年   88992篇
  1987年   87737篇
  1986年   83528篇
  1985年   79836篇
  1984年   60280篇
  1983年   51251篇
  1982年   31149篇
  1981年   27882篇
  1979年   57224篇
  1978年   40469篇
  1977年   34550篇
  1976年   31951篇
  1975年   34800篇
  1974年   42271篇
  1973年   40527篇
  1972年   38419篇
  1971年   35788篇
  1970年   33783篇
  1969年   31665篇
  1968年   29218篇
  1967年   26217篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
Background The B-MaP-C study aimed to determine alterations to breast cancer (BC) management during the peak transmission period of the UK COVID-19 pandemic and the potential impact of these treatment decisions.Methods This was a national cohort study of patients with early BC undergoing multidisciplinary team (MDT)-guided treatment recommendations during the pandemic, designated ‘standard’ or ‘COVID-altered’, in the preoperative, operative and post-operative setting.Findings Of 3776 patients (from 64 UK units) in the study, 2246 (59%) had ‘COVID-altered’ management. ‘Bridging’ endocrine therapy was used (n = 951) where theatre capacity was reduced. There was increasing access to COVID-19 low-risk theatres during the study period (59%). In line with national guidance, immediate breast reconstruction was avoided (n = 299). Where adjuvant chemotherapy was omitted (n = 81), the median benefit was only 3% (IQR 2–9%) using ‘NHS Predict’. There was the rapid adoption of new evidence-based hypofractionated radiotherapy (n = 781, from 46 units). Only 14 patients (1%) tested positive for SARS-CoV-2 during their treatment journey.Conclusions The majority of ‘COVID-altered’ management decisions were largely in line with pre-COVID evidence-based guidelines, implying that breast cancer survival outcomes are unlikely to be negatively impacted by the pandemic. However, in this study, the potential impact of delays to BC presentation or diagnosis remains unknown.Subject terms: Breast cancer, Surgical oncology, Health care economics, Quality of life, Health policy  相似文献   
72.
73.
The COVID-19 pandemic and the consequent declaration of a state of alarm have required changes throughout the entire health system and diagnostic imaging departments are no exception.In our department, these circumstances led to an immediate restructuring of the working dynamics of our group of imaging technologists that had an important role in the front lines of the battle. To ensure that these new needs were met, the staff had to be trained and distributed into different areas and working groups; moreover, new protective measures and protocols had to be adopted in the working environment. We also defined different care circuits for patients with COVID-19 and those without COVID-19, incorporating new technologies, adapting existing resources to the new scenario, and creating a circuit for the rapid diagnosis of COVID-19. This paper also provides detailed recommendations for organizing radiology departments in the case of new outbreaks of COVID-19.  相似文献   
74.
75.
Arguably, the two most important causes of pathological healing in the skin are diabetes and ageing. While these factors have historically been considered independent modifiers of the healing process, recent studies suggest that they may be mechanistically linked. The primary contributor to diabetic pathology is hyperglycaemia, which accelerates the production of advanced glycation end products, a characteristic of ageing tissue. Indeed, advanced age also leads to mild hyperglycaemia. Here, we discuss emerging literature that reveals a hitherto unappreciated link between cellular senescence, diabetes and wound repair. Senescent cells cause widespread destruction of normal tissue architecture in ageing and have been shown to be increased in chronic wounds. However, the role of senescence remains controversial, with several studies reporting beneficial effects for transiently induced senescence in wound healing. We recently highlighted a direct role for senescence in diabetic healing pathology, mediated by the senescence receptor, CXCR2. These findings suggest that targeting local tissue senescence may provide a therapeutic strategy applicable to a broad range of chronic wound types.  相似文献   
76.
77.
78.
79.
80.
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