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   1602012篇
  免费   131253篇
  国内免费   2577篇
耳鼻咽喉   21648篇
儿科学   52931篇
妇产科学   46228篇
基础医学   227774篇
口腔科学   47202篇
临床医学   140905篇
内科学   314786篇
皮肤病学   34096篇
神经病学   130119篇
特种医学   64724篇
外国民族医学   474篇
外科学   243825篇
综合类   39712篇
现状与发展   3篇
一般理论   544篇
预防医学   122861篇
眼科学   36472篇
药学   121264篇
  3篇
中国医学   2974篇
肿瘤学   87297篇
  2018年   14768篇
  2016年   12906篇
  2015年   15028篇
  2014年   20654篇
  2013年   31356篇
  2012年   42556篇
  2011年   44773篇
  2010年   26351篇
  2009年   25314篇
  2008年   43006篇
  2007年   45245篇
  2006年   46053篇
  2005年   44674篇
  2004年   44091篇
  2003年   42181篇
  2002年   41292篇
  2001年   75682篇
  2000年   78329篇
  1999年   66388篇
  1998年   17731篇
  1997年   16334篇
  1996年   16317篇
  1995年   16020篇
  1994年   15070篇
  1993年   14217篇
  1992年   55428篇
  1991年   53775篇
  1990年   52561篇
  1989年   50832篇
  1988年   47221篇
  1987年   46560篇
  1986年   44287篇
  1985年   42843篇
  1984年   32034篇
  1983年   27565篇
  1982年   16144篇
  1981年   14436篇
  1980年   13564篇
  1979年   30460篇
  1978年   21064篇
  1977年   17764篇
  1976年   16694篇
  1975年   17574篇
  1974年   21487篇
  1973年   20672篇
  1972年   18854篇
  1971年   17770篇
  1970年   16289篇
  1969年   15268篇
  1968年   13950篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
71.
72.
73.
On 8 April 2014, a US jury ordered Takeda and Eli Lilly to pay $9 bn in punitive damages after finding that they had concealed the cancer risks associated with pioglitazone. By contrast, on 28 August 2014, the long‐awaited outcome of the 10‐year Kaiser Permanente Northern California study was announced. That study was specifically designed to investigate whether patients exposed to pioglitazone were at an increased risk of bladder cancer and found no association; thus, at last, the controversial issue has been resolved. A review, in retrospect, of the story of the proposed link between pioglitazone and bladder cancer reveals flaws at every stage. In 2012, a BMJ editorial, in keeping with some other contemporary reports, stated ‘it can confidently be assumed that pioglitazone increases the risk of bladder cancer’. Examination of the information which led to such a statement shows that: 1) the pre‐clinical findings of bladder cancer in male rats is not indicative of human risk; 2) there is no association between bladder cancer and pioglitazone in randomized controlled trials, once cases that could not plausibly be related to treatment are removed; and 3) the observational studies that have suggested a link have over‐extrapolated from the data: pioglitazone‐treated patients had more risk factors for bladder cancer than those not treated with pioglitazone. Meanwhile careful study of randomized controlled trials shows evidence of cardiovascular benefit from pioglitazone in Type 2 diabetes, a condition which results, more than anything, in premature cardiovascular death and morbidity.  相似文献   
74.
While peer support has been investigated in multiple clinical contexts, its application to the postpartum setting is unknown. The aim was to assess acceptability of a postpartum peer support program for women with diabetes. Observational survey-based needs assessment of forty low-income women with diabetes, receiving care at a major medical institution. Mean age and gravidity were 30.7 years and 3.15 ± 1.67 respectively. 45 % expressed interest in a “buddy.” There was no significant difference between groups desiring and not desiring this program. A majority of respondents desired telephone, text messaging, and in-person contacts (79.2, 72.1, 83.8 %), with 72.5 % of patients desiring diabetes-related activities during clinic waiting time. Many women desire a postpartum diabetes reciprocal peer program for support outside of clinician visits. Patients are receptive to educational services during their wait and outside of clinic time, a potentially valuable opportunity to share important health information.  相似文献   
75.
Graefe's Archive for Clinical and Experimental Ophthalmology - Retinal microvascular endothelial dysfunction is thought to be of importance in the development of ocular vascular diseases....  相似文献   
76.
77.
78.
The first COVID-19 vaccination was given in December 2020 and there is an effort to vaccinate the international population on a massive scale. Common side effects from the vaccine include headache and tiredness. Regional lymphadenopathy has been described in relation to other vaccines. We describe two cases of supraclavicular reactive lymphadenopathy presenting in patients who had the COVID vaccination in the ipsilateral arm. Awareness of this diagnosis is important for patients presenting to the neck lump clinic.  相似文献   
79.
80.
Journal of Behavioral Medicine - Understanding associations between mothers’ and children’s physical activity and sedentary behavior on more fine-grained timescales can provide insights...  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