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   10188篇
  免费   799篇
  国内免费   81篇
耳鼻咽喉   61篇
儿科学   217篇
妇产科学   227篇
基础医学   1704篇
口腔科学   202篇
临床医学   953篇
内科学   2343篇
皮肤病学   298篇
神经病学   1233篇
特种医学   299篇
外科学   1057篇
综合类   30篇
一般理论   5篇
预防医学   575篇
眼科学   122篇
药学   815篇
中国医学   13篇
肿瘤学   914篇
  2024年   2篇
  2023年   145篇
  2022年   118篇
  2021年   429篇
  2020年   332篇
  2019年   379篇
  2018年   411篇
  2017年   316篇
  2016年   373篇
  2015年   366篇
  2014年   524篇
  2013年   598篇
  2012年   889篇
  2011年   831篇
  2010年   485篇
  2009年   464篇
  2008年   694篇
  2007年   657篇
  2006年   651篇
  2005年   568篇
  2004年   496篇
  2003年   446篇
  2002年   388篇
  2001年   75篇
  2000年   43篇
  1999年   62篇
  1998年   53篇
  1997年   48篇
  1996年   26篇
  1995年   40篇
  1994年   22篇
  1993年   18篇
  1992年   23篇
  1991年   13篇
  1990年   12篇
  1989年   7篇
  1988年   10篇
  1987年   7篇
  1986年   6篇
  1985年   9篇
  1984年   4篇
  1983年   2篇
  1982年   2篇
  1977年   4篇
  1942年   1篇
  1907年   2篇
  1906年   3篇
  1905年   3篇
  1904年   2篇
  1903年   4篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Cardiovascular Drugs and Therapy - Available animal models of acute heart failure (AHF) and their limitations are discussed herein. A novel and preclinically relevant porcine model of decompensated...  相似文献   
2.
3.
<正>Huntington's disease(HD):HD is an autosomal dominant neurodegenerative disease,caused by a CAG trinucleotide repeat expansion in the first exon of the HTT gene encoding the huntingtin protein.The mutant protein contains an expanded polyglutamine sequence that confers a toxic gain-of-function and causes neurodegeneration.Moreover,several studies indicate that loss of the normal protein beneficial  相似文献   
4.
5.
6.
Plaque‐like myofibroblastic tumor is a rare and benign pediatric soft tissue tumor. It presents as a slowly growing plaque reaching several centimeters in diameter, made up of multiple nodules. The clinical and histological features of this benign entity are similar to other fibrohistiocytic or myofibroblastic tumors occurring in childhood, so the diagnosis can be difficult. The correlation between clinical data, histopathology, and immunohistochemistry is necessary for the correct diagnosis.  相似文献   
7.

Background

In colorectal cancer liver metastases (CRCLM), bevacizumab-based neoadjuvant strategies provide increased pathologic response. We aimed at assessing the activity of perioperative capecitabine, oxaliplatin, irinotecan, and bevacizumab (COI-B regimen) in patients with potentially resectable CRCLM, and investigating biomarkers for early prediction of pathologic response.

Patients and Methods

This was a single-center phase II study enrolling patients with liver-limited, borderline resectable disease and/or high-risk features. Patients received 5 preoperative and 4 postoperative cycles of biweekly COI-B (irinotecan 180 mg/m2 and bevacizumab 5 mg/Kg on day 1, oxaliplatin 85 mg/m2 on day 2, and capecitabine 1000 mg/m2 twice a day on days 2 to 6). The primary endpoint was pathologic response rate in the intention-to-treat population. A Simon 2-stage design was adopted to detect an increase from 30% to 50% with a power of 90%. Dynamic imaging biomarkers (early tumor shrinkage [ETS], deepness of response, maximum standardized uptake volume [SUVmax]/regression index) and next generation sequencing data were explored as surrogates.

Results

From June 2013 to March 2017, 46 patients were enrolled. Pathologic response was achieved in 63% patients (endpoint met), and responders achieved significantly better survival outcomes with respect to non-responders. The most frequent grade 3/4 adverse events were diarrhea and neutropenia (8.7%) in the preoperative phase and thromboembolic events (5.9%) in the postoperative phase. ETS and lower SUV-2 were significantly associated with pathologic response.

Conclusion

The COI-B regimen is a feasible and highly active perioperative strategy in patients with molecularly unselected, potentially resectable CRCLM. ETS and SUV-2 have a promising role as imaging-based biomarkers for pathologic response.  相似文献   
8.
ABSTRACT

Introduction: A range of combination chemotherapy regimens are currently used in clinical practice. However, international antiemetic guidelines often only categorize the emetogenic potential of single agents rather than the emetogenicity of combination chemotherapy regimens. To manage the nausea and vomiting induced by antineoplastic combinations, guidelines suggest antiemetics that are appropriate for the component drug with the highest emetogenic potential. Furthermore, antiemetic guidelines generally do not consider the influence of other factors, including individual patient characteristics, on the emetic effects of cancer treatments. Similarly, the emetogenic potential of radiotherapy is stratified only according to the site of radiation, while other factors contributing to emetic risk are overlooked.

Areas covered: An Expert Panel was convened to examine unresolved issues and summarize the current clinical research on managing nausea and vomiting associated with combination chemotherapy and radiotherapy.

Expert opinion: The panel identified the incidence of nausea and vomiting induced by multi-drug combination therapies currently used to treat cancer at different anatomic sites and by radiotherapy in the presence of other risk factors. Based on these data and the clinical experience of panel members, several suggestions are made for a practical approach to prevent or manage nausea and vomiting due to chemotherapy regimens and radiation therapy.  相似文献   
9.
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