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   170172篇
  免费   7075篇
  国内免费   399篇
耳鼻咽喉   2248篇
儿科学   4946篇
妇产科学   4071篇
基础医学   24426篇
口腔科学   5577篇
临床医学   9903篇
内科学   37729篇
皮肤病学   4682篇
神经病学   13709篇
特种医学   4300篇
外国民族医学   1篇
外科学   19536篇
综合类   845篇
一般理论   28篇
预防医学   20296篇
眼科学   4401篇
药学   13299篇
中国医学   696篇
肿瘤学   6953篇
  2023年   843篇
  2022年   781篇
  2021年   2831篇
  2020年   1585篇
  2019年   3181篇
  2018年   5071篇
  2017年   3161篇
  2016年   3168篇
  2015年   3518篇
  2014年   4081篇
  2013年   6132篇
  2012年   10319篇
  2011年   10930篇
  2010年   5548篇
  2009年   4166篇
  2008年   8968篇
  2007年   9579篇
  2006年   9159篇
  2005年   8801篇
  2004年   8129篇
  2003年   7612篇
  2002年   7237篇
  2001年   5058篇
  2000年   5614篇
  1999年   4323篇
  1998年   882篇
  1992年   2314篇
  1991年   2068篇
  1990年   2038篇
  1989年   1756篇
  1988年   1677篇
  1987年   1555篇
  1986年   1604篇
  1985年   1509篇
  1984年   1064篇
  1983年   914篇
  1979年   1235篇
  1978年   816篇
  1977年   793篇
  1976年   764篇
  1975年   894篇
  1974年   1136篇
  1973年   1183篇
  1972年   1128篇
  1971年   1088篇
  1970年   1022篇
  1969年   1089篇
  1968年   1119篇
  1967年   985篇
  1966年   885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