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   197009篇
  免费   8595篇
  国内免费   477篇
耳鼻咽喉   2593篇
儿科学   5685篇
妇产科学   4470篇
基础医学   27828篇
口腔科学   7275篇
临床医学   11823篇
内科学   44430篇
皮肤病学   5244篇
神经病学   15958篇
特种医学   5064篇
外国民族医学   1篇
外科学   23890篇
综合类   976篇
一般理论   42篇
预防医学   21972篇
眼科学   5020篇
药学   14613篇
中国医学   781篇
肿瘤学   8416篇
  2023年   992篇
  2022年   1142篇
  2021年   3695篇
  2020年   2029篇
  2019年   3779篇
  2018年   5962篇
  2017年   3735篇
  2016年   3831篇
  2015年   4288篇
  2014年   5114篇
  2013年   7379篇
  2012年   12626篇
  2011年   13332篇
  2010年   6832篇
  2009年   5147篇
  2008年   10885篇
  2007年   11538篇
  2006年   11071篇
  2005年   10609篇
  2004年   9730篇
  2003年   9096篇
  2002年   8561篇
  2001年   5176篇
  2000年   5715篇
  1999年   4448篇
  1998年   1015篇
  1992年   2390篇
  1991年   2157篇
  1990年   2105篇
  1989年   1783篇
  1988年   1702篇
  1987年   1578篇
  1986年   1627篇
  1985年   1533篇
  1984年   1107篇
  1983年   966篇
  1979年   1251篇
  1978年   848篇
  1977年   836篇
  1976年   780篇
  1975年   906篇
  1974年   1155篇
  1973年   1206篇
  1972年   1144篇
  1971年   1104篇
  1970年   1034篇
  1969年   1101篇
  1968年   1125篇
  1967年   1007篇
  1966年   889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.
International Journal of Clinical Oncology - Immune-checkpoint inhibitors (ICIs) are standard treatments for metastatic non-small cell lung cancer (NSCLC). Patients with poor performance status...  相似文献   
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