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   168383篇
  免费   6953篇
  国内免费   367篇
耳鼻咽喉   2235篇
儿科学   4855篇
妇产科学   4028篇
基础医学   24214篇
口腔科学   5494篇
临床医学   9724篇
内科学   37309篇
皮肤病学   4653篇
神经病学   13603篇
特种医学   4094篇
外国民族医学   1篇
外科学   19392篇
综合类   812篇
一般理论   26篇
预防医学   20146篇
眼科学   4390篇
药学   13186篇
中国医学   691篇
肿瘤学   6850篇
  2023年   836篇
  2022年   769篇
  2021年   2769篇
  2020年   1562篇
  2019年   3143篇
  2018年   5028篇
  2017年   3141篇
  2016年   3131篇
  2015年   3472篇
  2014年   4032篇
  2013年   6072篇
  2012年   10257篇
  2011年   10885篇
  2010年   5475篇
  2009年   4102篇
  2008年   8891篇
  2007年   9511篇
  2006年   9100篇
  2005年   8717篇
  2004年   8074篇
  2003年   7578篇
  2002年   7204篇
  2001年   5008篇
  2000年   5555篇
  1999年   4252篇
  1998年   814篇
  1992年   2279篇
  1991年   2040篇
  1990年   2014篇
  1989年   1724篇
  1988年   1624篇
  1987年   1527篇
  1986年   1576篇
  1985年   1461篇
  1984年   1051篇
  1983年   907篇
  1979年   1219篇
  1978年   812篇
  1977年   784篇
  1976年   748篇
  1975年   886篇
  1974年   1132篇
  1973年   1179篇
  1972年   1126篇
  1971年   1087篇
  1970年   1012篇
  1969年   1089篇
  1968年   1112篇
  1967年   985篇
  1966年   887篇
排序方式: 共有10000条查询结果,搜索用时 15 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.
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   

8.

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   
9.
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