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   302159篇
  免费   15148篇
  国内免费   2006篇
耳鼻咽喉   4102篇
儿科学   8503篇
妇产科学   8199篇
基础医学   44400篇
口腔科学   9698篇
临床医学   21014篇
内科学   62122篇
皮肤病学   7410篇
神经病学   23283篇
特种医学   8699篇
外国民族医学   4篇
外科学   38466篇
综合类   6130篇
一般理论   67篇
预防医学   29243篇
眼科学   7523篇
药学   24124篇
中国医学   1555篇
肿瘤学   14771篇
  2021年   4129篇
  2020年   2352篇
  2019年   4440篇
  2018年   7360篇
  2017年   4861篇
  2016年   4885篇
  2015年   5515篇
  2014年   6490篇
  2013年   9384篇
  2012年   15292篇
  2011年   16034篇
  2010年   8392篇
  2009年   6685篇
  2008年   13417篇
  2007年   14332篇
  2006年   13857篇
  2005年   13126篇
  2004年   12120篇
  2003年   11419篇
  2002年   10838篇
  2001年   11776篇
  2000年   12504篇
  1999年   9996篇
  1998年   2684篇
  1997年   1947篇
  1996年   1502篇
  1992年   6022篇
  1991年   5831篇
  1990年   5533篇
  1989年   5274篇
  1988年   5027篇
  1987年   4810篇
  1986年   4622篇
  1985年   4412篇
  1984年   3050篇
  1983年   2650篇
  1979年   3061篇
  1978年   1963篇
  1977年   1749篇
  1976年   1641篇
  1975年   2023篇
  1974年   2438篇
  1973年   2504篇
  1972年   2401篇
  1971年   2253篇
  1970年   2072篇
  1969年   2125篇
  1968年   2063篇
  1967年   1825篇
  1966年   1645篇
排序方式: 共有10000条查询结果,搜索用时 140 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.
4.
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   
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