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   1279657篇
  免费   93159篇
  国内免费   1998篇
耳鼻咽喉   18206篇
儿科学   42350篇
妇产科学   37902篇
基础医学   187457篇
口腔科学   35403篇
临床医学   108542篇
内科学   252283篇
皮肤病学   26539篇
神经病学   99389篇
特种医学   50159篇
外国民族医学   366篇
外科学   198177篇
综合类   26535篇
现状与发展   1篇
一般理论   301篇
预防医学   92744篇
眼科学   29083篇
药学   97962篇
  1篇
中国医学   2496篇
肿瘤学   68918篇
  2018年   11863篇
  2015年   11660篇
  2014年   16081篇
  2013年   24470篇
  2012年   33696篇
  2011年   36104篇
  2010年   21305篇
  2009年   20105篇
  2008年   35109篇
  2007年   38101篇
  2006年   38671篇
  2005年   37934篇
  2004年   36516篇
  2003年   35491篇
  2002年   35024篇
  2001年   58192篇
  2000年   59688篇
  1999年   50785篇
  1998年   14274篇
  1997年   12855篇
  1996年   13100篇
  1995年   12372篇
  1994年   11780篇
  1993年   10882篇
  1992年   41046篇
  1991年   40412篇
  1990年   39929篇
  1989年   38760篇
  1988年   36157篇
  1987年   35395篇
  1986年   33767篇
  1985年   32192篇
  1984年   23956篇
  1983年   20848篇
  1982年   12398篇
  1981年   10946篇
  1980年   10219篇
  1979年   22680篇
  1978年   15905篇
  1977年   13758篇
  1976年   12995篇
  1975年   14219篇
  1974年   16709篇
  1973年   16111篇
  1972年   15352篇
  1971年   14257篇
  1970年   13229篇
  1969年   12746篇
  1968年   11997篇
  1967年   10496篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
42.
43.
44.
45.
46.
47.
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   
48.
49.
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   
50.
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