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   1415613篇
  免费   99979篇
  国内免费   2374篇
耳鼻咽喉   20127篇
儿科学   46699篇
妇产科学   40726篇
基础医学   205406篇
口腔科学   42107篇
临床医学   118359篇
内科学   281687篇
皮肤病学   30103篇
神经病学   110693篇
特种医学   54222篇
外国民族医学   388篇
外科学   214775篇
综合类   27700篇
现状与发展   2篇
一般理论   352篇
预防医学   107772篇
眼科学   31671篇
药学   106029篇
  1篇
中国医学   3085篇
肿瘤学   76062篇
  2018年   15897篇
  2017年   11954篇
  2016年   12917篇
  2015年   14925篇
  2014年   20630篇
  2013年   30118篇
  2012年   42472篇
  2011年   45408篇
  2010年   26062篇
  2009年   24249篇
  2008年   42152篇
  2007年   45676篇
  2006年   45629篇
  2005年   45068篇
  2004年   43305篇
  2003年   41563篇
  2002年   39482篇
  2001年   61605篇
  2000年   63068篇
  1999年   53810篇
  1998年   15407篇
  1997年   13786篇
  1996年   14017篇
  1995年   13174篇
  1994年   12588篇
  1993年   11608篇
  1992年   42861篇
  1991年   42249篇
  1990年   41586篇
  1989年   40361篇
  1988年   37617篇
  1987年   36790篇
  1986年   35022篇
  1985年   33396篇
  1984年   24862篇
  1983年   21540篇
  1982年   12793篇
  1981年   11312篇
  1979年   23314篇
  1978年   16336篇
  1977年   14079篇
  1976年   13271篇
  1975年   14629篇
  1974年   17107篇
  1973年   16488篇
  1972年   15662篇
  1971年   14544篇
  1970年   13577篇
  1969年   13078篇
  1968年   12343篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
52.
53.
54.
55.
56.
PurposeOur purpose was to determine the effect of chemoradiotherapy (CRT) on patient-reported quality of life (QOL) for patients with intact pancreas cancer.Methods and MaterialsWe reviewed a prospective QOL registry for patients with intact, clinically localized pancreatic ductal adenocarcinoma treated with CRT between June 2015 and November 2018. QOL was assessed pre-CRT (immediately before CRT, after neoadjuvant chemotherapy) and at the completion of CRT with the Functional Assessment of Cancer Therapy-Hepatobiliary (FACT-Hep) and its component parts: FACT-General (FACT-G) and hepatobiliary cancer subscore (HCS). A minimally important difference from pre-CRT was defined as ≥ 6, 5, and 8 points for FACT-G, HCS, and FACT-Hep, respectively.ResultsOf 157 patients who underwent CRT, 100 completed both pre- and post-CRT surveys and were included in the primary analysis. Median age at diagnosis was 65 years (range, 23-90). National Comprehensive Cancer Network resectability status was resectable (3%), borderline resectable (40%), or locally advanced (57%). Folinic acid, 5-fluorouracil, irinotecan, and oxaliplatin (FOLFIRINOX) (75%) or gemcitabine and nab-paclitaxel (42%) were given for a median of 6 cycles (range, 0-42) before CRT. Radiation therapy techniques included 3-dimensional conformal (22%), intensity modulated photon (55%), and intensity modulated proton (23%) radiation therapy to a median dose of 50 Gy (range, 36-62.5). Concurrent chemotherapy was most commonly capecitabine (82%). Sixty-three patients (63%) had surgery after CRT. The mean decline in FACT-G, HCS subscale, and FACT-Hep from pre- to post-CRT was 3.5 (standard deviation [SD], 13.7), 1.7 (SD 7.8), and 5.2 (SD 19.4), respectively. Each of these changes were statistically significant, but did not meet the minimally important difference threshold. Pancreatic head tumor location was associated with decline in FACT-Hep. Nausea was the toxicity with the greatest increase from pre- to post-CRT by both physician-assessment and patient-reported QOL.ConclusionsFor patients with intact pancreatic adenocarcinoma, modern CRT is well tolerated with minimal decline in QOL during treatment.  相似文献   
57.
58.
59.
60.
Breast elastography has been available for more than 15 years but is not widely incorporated into clinical practice. Many publications report extremely high accuracy for various breast elastographic techniques. However, results in the literature are extremely variable. This variability is most likely due to variations in technique, a relatively steep learning curve, and variability in methods between vendors. This article describes our protocol for performing breast elastography using both strain elastography and shear wave elastography, which produces high sensitivity and specificity. Additionally, we will describe the most commonly known false-positive and false-negative lesions as well as how to detect them.  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