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   176499篇
  免费   7277篇
  国内免费   365篇
耳鼻咽喉   2423篇
儿科学   5119篇
妇产科学   4101篇
基础医学   25428篇
口腔科学   6060篇
临床医学   10315篇
内科学   38317篇
皮肤病学   4745篇
神经病学   14388篇
特种医学   4646篇
外国民族医学   6篇
外科学   20851篇
综合类   810篇
一般理论   32篇
预防医学   20337篇
眼科学   4743篇
药学   13725篇
中国医学   709篇
肿瘤学   7386篇
  2023年   887篇
  2022年   645篇
  2021年   2639篇
  2020年   1505篇
  2019年   2996篇
  2018年   5286篇
  2017年   3311篇
  2016年   3371篇
  2015年   3692篇
  2014年   4128篇
  2013年   6223篇
  2012年   10845篇
  2011年   11354篇
  2010年   5642篇
  2009年   4135篇
  2008年   9351篇
  2007年   10019篇
  2006年   9588篇
  2005年   9174篇
  2004年   8515篇
  2003年   7968篇
  2002年   7618篇
  2001年   5242篇
  2000年   5861篇
  1999年   4485篇
  1998年   782篇
  1992年   2376篇
  1991年   2138篇
  1990年   2135篇
  1989年   1824篇
  1988年   1753篇
  1987年   1650篇
  1986年   1692篇
  1985年   1595篇
  1984年   1136篇
  1983年   988篇
  1979年   1340篇
  1978年   876篇
  1977年   860篇
  1976年   788篇
  1975年   934篇
  1974年   1184篇
  1973年   1242篇
  1972年   1178篇
  1971年   1138篇
  1970年   1075篇
  1969年   1138篇
  1968年   1174篇
  1967年   1016篇
  1966年   923篇
排序方式: 共有10000条查询结果,搜索用时 46 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