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   1356963篇
  免费   87215篇
  国内免费   1988篇
耳鼻咽喉   18751篇
儿科学   43562篇
妇产科学   34954篇
基础医学   193369篇
口腔科学   36436篇
临床医学   116919篇
内科学   267887篇
皮肤病学   32587篇
神经病学   106663篇
特种医学   50992篇
外国民族医学   327篇
外科学   198980篇
综合类   23014篇
现状与发展   1篇
一般理论   340篇
预防医学   100170篇
眼科学   29997篇
药学   105700篇
  7篇
中国医学   3711篇
肿瘤学   81799篇
  2021年   12888篇
  2019年   13215篇
  2018年   20018篇
  2017年   14595篇
  2016年   15785篇
  2015年   17620篇
  2014年   22795篇
  2013年   33733篇
  2012年   49482篇
  2011年   51402篇
  2010年   28898篇
  2009年   26031篇
  2008年   46153篇
  2007年   49317篇
  2006年   48811篇
  2005年   47154篇
  2004年   44627篇
  2003年   42405篇
  2002年   40640篇
  2001年   67479篇
  2000年   69049篇
  1999年   57590篇
  1998年   14026篇
  1997年   12253篇
  1996年   12160篇
  1995年   11355篇
  1994年   10193篇
  1993年   9630篇
  1992年   41410篇
  1991年   39540篇
  1990年   38815篇
  1989年   37054篇
  1988年   33501篇
  1987年   32416篇
  1986年   30553篇
  1985年   28575篇
  1984年   20770篇
  1983年   17438篇
  1982年   9612篇
  1979年   18368篇
  1978年   12326篇
  1977年   11099篇
  1976年   9563篇
  1975年   11016篇
  1974年   12761篇
  1973年   12388篇
  1972年   11802篇
  1971年   11147篇
  1970年   10255篇
  1969年   9977篇
排序方式: 共有10000条查询结果,搜索用时 17 毫秒
21.
Breast pseudoaneurysms after a core needle biopsy are a rare complication with a low incidence. However, it is important to be aware of the possibility of complications that require treatment.  相似文献   
22.
23.
24.
25.
26.
27.
28.
29.
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   

30.

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   
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