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   188706篇
  免费   8556篇
  国内免费   390篇
耳鼻咽喉   2500篇
儿科学   5701篇
妇产科学   4463篇
基础医学   26872篇
口腔科学   6376篇
临床医学   12078篇
内科学   41017篇
皮肤病学   4870篇
神经病学   15198篇
特种医学   5078篇
外国民族医学   1篇
外科学   22305篇
综合类   1152篇
一般理论   69篇
预防医学   22066篇
眼科学   4744篇
药学   14361篇
  1篇
中国医学   688篇
肿瘤学   8112篇
  2023年   909篇
  2021年   2870篇
  2020年   1669篇
  2019年   3244篇
  2018年   5438篇
  2017年   3463篇
  2016年   3454篇
  2015年   3909篇
  2014年   4429篇
  2013年   6650篇
  2012年   11370篇
  2011年   12062篇
  2010年   5992篇
  2009年   4459篇
  2008年   9947篇
  2007年   10686篇
  2006年   10208篇
  2005年   9781篇
  2004年   9047篇
  2003年   8519篇
  2002年   8019篇
  2001年   5614篇
  2000年   6155篇
  1999年   4726篇
  1998年   957篇
  1996年   667篇
  1992年   2735篇
  1991年   2487篇
  1990年   2430篇
  1989年   2152篇
  1988年   2027篇
  1987年   1900篇
  1986年   1870篇
  1985年   1846篇
  1984年   1335篇
  1983年   1163篇
  1979年   1426篇
  1978年   989篇
  1977年   936篇
  1976年   890篇
  1975年   1036篇
  1974年   1282篇
  1973年   1370篇
  1972年   1279篇
  1971年   1225篇
  1970年   1130篇
  1969年   1194篇
  1968年   1201篇
  1967年   1068篇
  1966年   967篇
排序方式: 共有10000条查询结果,搜索用时 62 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.
9.
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   

10.

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