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   225835篇
  免费   10159篇
  国内免费   557篇
耳鼻咽喉   2974篇
儿科学   6816篇
妇产科学   5686篇
基础医学   32427篇
口腔科学   7302篇
临床医学   14258篇
内科学   50653篇
皮肤病学   6914篇
神经病学   18465篇
特种医学   5642篇
外国民族医学   30篇
外科学   27084篇
综合类   1119篇
一般理论   38篇
预防医学   24557篇
眼科学   5301篇
药学   16903篇
中国医学   876篇
肿瘤学   9506篇
  2023年   1157篇
  2022年   1695篇
  2021年   4302篇
  2020年   2379篇
  2019年   4387篇
  2018年   6353篇
  2017年   4061篇
  2016年   4177篇
  2015年   4558篇
  2014年   5755篇
  2013年   8475篇
  2012年   13441篇
  2011年   14012篇
  2010年   7423篇
  2009年   6122篇
  2008年   11576篇
  2007年   12234篇
  2006年   11835篇
  2005年   11542篇
  2004年   10655篇
  2003年   9939篇
  2002年   9549篇
  2001年   6833篇
  2000年   7368篇
  1999年   5923篇
  1998年   1481篇
  1997年   1057篇
  1992年   3102篇
  1991年   2892篇
  1990年   2833篇
  1989年   2463篇
  1988年   2286篇
  1987年   2136篇
  1986年   2153篇
  1985年   2001篇
  1984年   1473篇
  1983年   1278篇
  1979年   1587篇
  1978年   1066篇
  1977年   1004篇
  1975年   1152篇
  1974年   1426篇
  1973年   1459篇
  1972年   1376篇
  1971年   1323篇
  1970年   1263篇
  1969年   1324篇
  1968年   1308篇
  1967年   1173篇
  1966年   1068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.
Breast pseudoaneurysms after a core needle biopsy are a rare complication with a low incidence. However, it is important to be aware of the possibility of complications that require treatment.  相似文献   
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