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   3148309篇
  免费   248107篇
  国内免费   6579篇
耳鼻咽喉   44840篇
儿科学   99719篇
妇产科学   85463篇
基础医学   446854篇
口腔科学   92348篇
临床医学   285160篇
内科学   613786篇
皮肤病学   68375篇
神经病学   261629篇
特种医学   122275篇
外国民族医学   1149篇
外科学   469215篇
综合类   73211篇
现状与发展   1篇
一般理论   1317篇
预防医学   260721篇
眼科学   74220篇
药学   233505篇
  7篇
中国医学   6304篇
肿瘤学   162896篇
  2018年   35730篇
  2017年   26867篇
  2016年   29765篇
  2015年   33391篇
  2014年   47236篇
  2013年   71879篇
  2012年   97704篇
  2011年   103087篇
  2010年   60471篇
  2009年   56972篇
  2008年   95955篇
  2007年   101931篇
  2006年   102586篇
  2005年   99532篇
  2004年   95873篇
  2003年   92039篇
  2002年   90015篇
  2001年   140231篇
  2000年   145177篇
  1999年   122527篇
  1998年   35872篇
  1997年   32367篇
  1996年   31911篇
  1995年   30893篇
  1994年   28935篇
  1993年   26915篇
  1992年   98500篇
  1991年   95487篇
  1990年   92584篇
  1989年   89168篇
  1988年   82407篇
  1987年   81510篇
  1986年   77192篇
  1985年   73885篇
  1984年   56005篇
  1983年   47832篇
  1982年   29190篇
  1981年   25994篇
  1979年   52815篇
  1978年   37280篇
  1977年   31584篇
  1976年   29757篇
  1975年   31349篇
  1974年   38699篇
  1973年   36892篇
  1972年   34411篇
  1971年   31988篇
  1970年   29896篇
  1969年   27952篇
  1968年   25618篇
排序方式: 共有10000条查询结果,搜索用时 66 毫秒
41.
42.
Academic output is just one aspect of a successful career as a plastic surgeon. However, for those with a strong interest in academia, the academic output of a department will likely be a key factor when deciding how to rank jobs. The aim of this study was to quantify and rank the academic output of plastic surgery units across the UK and Ireland. The Institute for Scientific Information (ISI) Web of Science Bibliometric analysis tool was used to collate cumulative (1950–2016), 10 year (2006–2016) and 3 years (2013–2015) research output data for plastic surgery units in the UK and Ireland. Sixty-six plastic surgery units were identified. Departments were ranked for each time period according to the number of papers produced, number of citations (Nc) and h-index (a measure of the impact of scientific output). The top 3 departments for number of papers in the last 10 years were The Royal Free Hospital, London (226) Broomfield Hospital, Chelmsford (218), and Morriston Hospital and Swansea (188). The top 3 for h-number were The Royal Free Hospital (21) Wythenshawe Hospital, Manchester (18) and Morriston Hospital (17). Academic output varies across plastic surgery units in the UK and Ireland. A number of departments have consistently maintained high academic outputs across the years and will be of interest to surgeons hoping to pursue a career in academia.  相似文献   
43.
44.
45.
46.
47.
Introduction: The treatment of classical Hodgkin lymphoma (cHL) in children is a story of success. Nowadays, more than 90% of patients are cured and overall survival is nearly 100% at 5 years. Efforts have been made to avoid related effects of therapies; therefore, children are treated using different chemotherapy schemes in comparison with adults.

Areas covered: This review includes a view of the clinical classification and risk assessment in children suffering from HL. The chemotherapy more commonly employed is revisited. The use of PET/CT to evaluate the disease in order to guide therapy is analyzed. New options of chemotherapy and emerging immunotherapy are also included.

Expert opinion: In order to make the right treatment choice, a proper initial assessment of risk is mandatory. The choice of therapy in these kinds of patients must be done according to the experience of the team, and also, the cost and logistics related to the eligible scheme are very important. If possible, efforts must be made to include PET/CT in guiding therapy and avoiding overtreatment and long-term adverse effects in children. New options in immunotherapy are emerging and must be considered with caution in selected patients.  相似文献   

48.

Purpose

Endovascular treatment with mechanical thrombectomy devices demonstrated high recanalization rates but functional outcome did not correlate with high rates of recanalization obtained. Patient selection prior to the endovascular treatment is very important in the final outcome of the patient. The primary aim of our study was to evaluate the prognostic value of posterior circulation Alberta Stroke Program Early CT Score (pc-ASPECTS) and Pons-Midbrain Index (PMI) scores in patients with Basilar Artery Occlusion (BAO) treated with successful angiographic recanalization after mechanical thrombectomy.

Methods

Retrospective single-center study including 18 patients between 2008 and 2013 who had acute basilar artery occlusion managed with endovascular treatment within 24 hours from symptoms onset and with successful angiographic recanalization. The patients were initially classified into two groups according to clinical outcome and mortality at 90 days. For analysis we also divided patients into groups based on pc-ASPECTS (≥8vs.< 8) and PMI (≥3vs.< 3) on non-contrast CT (NCCT) and CT Angiography Source Images (CTASI). Imaging data were correlated to clinical outcome and mortality rate.

Results

CTASI pc-ASPECTS, dichotomized at < 8 versus≥8, was associated with a favorable outcome (RR: 2.6; 95% CI: 1.3-5.2) and a reduced risk of death (RR: 6.5: 95% CI: 7.8-23.3). All patients that survived and were functionally independent had pc-ASPECTS score≥8. None of the 5 patients with CTASI pc-ASPECTS score less than 8 survived.

Conclusion

PC-ASPECTS on CTASI is helpful for predicting functional outcome after BAO recanalization with endovascular treatment. These results should be validated in a randomized controlled trial in order to decide whether or not to treat a patient with BAO.  相似文献   
49.
50.
Gattermann  J. 《Der Onkologe》2020,26(11):1010-1018
Die Onkologie - Die Corona-Pandemie hat in den letzten Monaten verdeutlicht, dass das Thema Sterblichkeit trotz erheblicher Fortschritte im Bereich der Hospiz- und Palliativversorgung zu...  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