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   176465篇
  免费   7586篇
  国内免费   486篇
耳鼻咽喉   2380篇
儿科学   5018篇
妇产科学   4035篇
基础医学   25543篇
口腔科学   6053篇
临床医学   10310篇
内科学   38772篇
皮肤病学   4923篇
神经病学   14426篇
特种医学   4435篇
外国民族医学   1篇
外科学   20479篇
综合类   878篇
一般理论   30篇
预防医学   20543篇
眼科学   4722篇
药学   13806篇
中国医学   812篇
肿瘤学   7371篇
  2023年   913篇
  2022年   802篇
  2021年   2886篇
  2020年   1609篇
  2019年   3180篇
  2018年   5357篇
  2017年   3351篇
  2016年   3473篇
  2015年   3938篇
  2014年   4387篇
  2013年   6506篇
  2012年   11170篇
  2011年   11691篇
  2010年   5904篇
  2009年   4333篇
  2008年   9533篇
  2007年   10148篇
  2006年   9679篇
  2005年   9239篇
  2004年   8537篇
  2003年   7957篇
  2002年   7555篇
  2001年   4976篇
  2000年   5551篇
  1999年   4244篇
  1998年   794篇
  1992年   2264篇
  1991年   2038篇
  1990年   2020篇
  1989年   1717篇
  1988年   1645篇
  1987年   1528篇
  1986年   1572篇
  1985年   1489篇
  1984年   1071篇
  1983年   924篇
  1979年   1231篇
  1978年   829篇
  1977年   798篇
  1976年   770篇
  1975年   895篇
  1974年   1131篇
  1973年   1180篇
  1972年   1124篇
  1971年   1093篇
  1970年   1019篇
  1969年   1095篇
  1968年   1114篇
  1967年   985篇
  1966年   886篇
排序方式: 共有10000条查询结果,搜索用时 281 毫秒
1.
Molnár  B.  Aroca  S.  Dobos  A.  Orbán  K.  Szabó  J.  Windisch  P.  Stähli  A.  Sculean  A. 《Clinical oral investigations》2022,26(12):7135-7142
Clinical Oral Investigations - To evaluate t he long-term outcomes following treatment of RT 1 multiple adjacent gingival recessions (MAGR) using the modified coronally advanced tunnel (MCAT) with...  相似文献   
2.
3.
Journal of Immigrant and Minority Health - COVID-19 has disproportionally affected underrepresented minorities (URM) and low-income immigrants in the United States. The aim of the study is to...  相似文献   
4.
5.
6.
7.
8.
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   

9.

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   
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