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   862671篇
  免费   70513篇
  国内免费   1837篇
耳鼻咽喉   12805篇
儿科学   24637篇
妇产科学   25097篇
基础医学   124305篇
口腔科学   25519篇
临床医学   75326篇
内科学   164589篇
皮肤病学   16973篇
神经病学   70152篇
特种医学   35218篇
外国民族医学   171篇
外科学   136225篇
综合类   24605篇
现状与发展   2篇
一般理论   263篇
预防医学   66883篇
眼科学   20519篇
药学   64859篇
中国医学   1593篇
肿瘤学   45280篇
  2018年   7336篇
  2015年   7729篇
  2014年   11113篇
  2013年   16788篇
  2012年   22716篇
  2011年   23837篇
  2010年   13865篇
  2009年   13066篇
  2008年   22585篇
  2007年   24642篇
  2006年   24509篇
  2005年   24153篇
  2004年   23716篇
  2003年   22846篇
  2002年   21944篇
  2001年   35834篇
  2000年   36484篇
  1999年   30920篇
  1998年   9226篇
  1997年   8550篇
  1996年   8484篇
  1995年   8013篇
  1994年   7730篇
  1992年   26689篇
  1991年   26118篇
  1990年   25633篇
  1989年   24698篇
  1988年   23236篇
  1987年   22897篇
  1986年   21754篇
  1985年   21109篇
  1984年   16397篇
  1983年   14008篇
  1982年   8859篇
  1981年   8213篇
  1980年   7681篇
  1979年   16744篇
  1978年   12122篇
  1977年   10191篇
  1976年   9335篇
  1975年   10150篇
  1974年   12646篇
  1973年   12141篇
  1972年   11542篇
  1971年   10690篇
  1970年   10221篇
  1969年   9920篇
  1968年   8904篇
  1967年   8232篇
  1966年   7659篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
33.
34.
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   
35.
36.
37.
38.
39.
40.
The aim of this study was to analyse the effect of body mass index (BMI), both low and high values, on the perioperative complication rate in patients with oral squamous cell carcinoma (OSCC). The medical records of 259 patients operated between 2014 and 2017 for OSCC were reviewed. Univariate and multivariate analyses were performed. Sixty of the 259 patients developed 87 complications. Low or high BMI was not associated with the perioperative complication rate. A longer operating time and increased blood loss were associated with a higher perioperative complication rate and higher Clavien–Dindo grade. Low BMI, American Society of Anesthesiologists score 2 and 3, a longer operating time, and increased blood loss were associated with a longer hospital stay. Low BMI was associated with a longer hospital stay. Neither low nor high BMI was associated with the perioperative complication rate. A longer operating time and increased blood loss were associated with a higher perioperative complication rate and higher Clavien–Dindo grade.  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