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   1354344篇
  免费   101461篇
  国内免费   7375篇
耳鼻咽喉   19010篇
儿科学   43127篇
妇产科学   39002篇
基础医学   197163篇
口腔科学   36740篇
临床医学   118779篇
内科学   263270篇
皮肤病学   27489篇
神经病学   103506篇
特种医学   53002篇
外国民族医学   419篇
外科学   205729篇
综合类   37144篇
现状与发展   22篇
一般理论   320篇
预防医学   97572篇
眼科学   31996篇
药学   106009篇
  68篇
中国医学   6644篇
肿瘤学   76169篇
  2021年   11465篇
  2018年   14823篇
  2017年   11401篇
  2016年   12635篇
  2015年   15365篇
  2014年   20594篇
  2013年   28400篇
  2012年   39545篇
  2011年   42408篇
  2010年   25207篇
  2009年   23034篇
  2008年   39133篇
  2007年   41964篇
  2006年   42617篇
  2005年   41785篇
  2004年   39053篇
  2003年   37837篇
  2002年   36941篇
  2001年   59713篇
  2000年   61213篇
  1999年   52628篇
  1998年   15484篇
  1997年   14036篇
  1996年   14010篇
  1995年   13229篇
  1994年   12510篇
  1993年   11321篇
  1992年   41529篇
  1991年   40803篇
  1990年   40310篇
  1989年   39071篇
  1988年   36434篇
  1987年   35621篇
  1986年   33945篇
  1985年   32319篇
  1984年   24031篇
  1983年   20895篇
  1982年   12412篇
  1979年   22690篇
  1978年   15896篇
  1977年   13738篇
  1976年   12983篇
  1975年   14209篇
  1974年   16708篇
  1973年   16093篇
  1972年   15325篇
  1971年   14241篇
  1970年   13219篇
  1969年   12743篇
  1968年   11985篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
83.
84.
85.
86.
87.
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   
88.
89.
90.
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