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   1286464篇
  免费   95589篇
  国内免费   2000篇
耳鼻咽喉   18296篇
儿科学   42503篇
妇产科学   38084篇
基础医学   188772篇
口腔科学   35611篇
临床医学   109198篇
内科学   253112篇
皮肤病学   26693篇
神经病学   100362篇
特种医学   50464篇
外国民族医学   366篇
外科学   199415篇
综合类   26964篇
现状与发展   1篇
一般理论   356篇
预防医学   93858篇
眼科学   29395篇
药学   98704篇
  1篇
中国医学   2502篇
肿瘤学   69396篇
  2018年   12123篇
  2016年   10251篇
  2015年   11901篇
  2014年   16362篇
  2013年   24861篇
  2012年   34195篇
  2011年   36663篇
  2010年   21608篇
  2009年   20344篇
  2008年   35579篇
  2007年   38550篇
  2006年   39011篇
  2005年   38320篇
  2004年   36923篇
  2003年   35839篇
  2002年   35375篇
  2001年   58439篇
  2000年   59945篇
  1999年   51036篇
  1998年   14391篇
  1997年   12951篇
  1996年   13191篇
  1995年   12490篇
  1994年   11877篇
  1993年   10978篇
  1992年   41252篇
  1991年   40630篇
  1990年   40129篇
  1989年   38981篇
  1988年   36318篇
  1987年   35582篇
  1986年   33939篇
  1985年   32404篇
  1984年   24122篇
  1983年   20990篇
  1982年   12459篇
  1981年   10944篇
  1979年   22741篇
  1978年   15931篇
  1977年   13758篇
  1976年   13000篇
  1975年   14254篇
  1974年   16755篇
  1973年   16139篇
  1972年   15416篇
  1971年   14306篇
  1970年   13266篇
  1969年   12785篇
  1968年   12025篇
  1967年   10518篇
排序方式: 共有10000条查询结果,搜索用时 93 毫秒
71.
72.
73.
74.
75.
76.
77.
78.
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   
79.
80.
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