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   2057482篇
  免费   148567篇
  国内免费   3138篇
耳鼻咽喉   29418篇
儿科学   62677篇
妇产科学   57464篇
基础医学   296364篇
口腔科学   59793篇
临床医学   176486篇
内科学   402816篇
皮肤病学   42885篇
神经病学   160434篇
特种医学   80709篇
外国民族医学   442篇
外科学   325807篇
综合类   41704篇
现状与发展   2篇
一般理论   511篇
预防医学   145206篇
眼科学   47445篇
药学   158701篇
  3篇
中国医学   4309篇
肿瘤学   116011篇
  2018年   19238篇
  2016年   16452篇
  2015年   18976篇
  2014年   25992篇
  2013年   39052篇
  2012年   53651篇
  2011年   57015篇
  2010年   33802篇
  2009年   32034篇
  2008年   55499篇
  2007年   59471篇
  2006年   60550篇
  2005年   59072篇
  2004年   56952篇
  2003年   55045篇
  2002年   54235篇
  2001年   102736篇
  2000年   106031篇
  1999年   89453篇
  1998年   23294篇
  1997年   20690篇
  1996年   20915篇
  1995年   19608篇
  1994年   18475篇
  1993年   17089篇
  1992年   70483篇
  1991年   68499篇
  1990年   67037篇
  1989年   65312篇
  1988年   60429篇
  1987年   58980篇
  1986年   55828篇
  1985年   53339篇
  1984年   39021篇
  1983年   33586篇
  1982年   18907篇
  1981年   16647篇
  1979年   35995篇
  1978年   24880篇
  1977年   21470篇
  1976年   19617篇
  1975年   21562篇
  1974年   25742篇
  1973年   24511篇
  1972年   23401篇
  1971年   21903篇
  1970年   20567篇
  1969年   19717篇
  1968年   18272篇
  1967年   16165篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
103.
104.
105.
106.
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   
107.
108.
109.
110.
We report a case of intestinal obstruction in a 73-year-old woman caused by ileocolic intussusception. The underlying cause was a giant submucosal ulcerating lipoma (6?×?3.3?×?3.8 cm) extending from the superior mucosal lip of Bauhin’s valve. Abdominal ultrasonography showed a pathognomonic target-like mass appearing as multiple concentric rings. CT scan confirmed the diagnosis. Because of apparent obstruction, a laparotomy with right hemicolectomy and ileocolic anastomosis was performed. Lipomas most frequently occur in the cecum and ascending colon where they represent the most common submucosal mesenchymal tumor. They typically occur in elderly women with an incidence that varies from 0.15 to 0.56 %. Pain, rectal bleeding, and obstruction are typical symptoms. When faced with an intussusception in children, reduction with air per rectum can be performed. In adults, however, malignant cell spreading and seeding is of big concern. Since approximately 20–50 % of all underlying causes are malignant, explorative surgery is favored in adults.  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