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   1158280篇
  免费   92701篇
  国内免费   13616篇
耳鼻咽喉   14672篇
儿科学   36673篇
妇产科学   29819篇
基础医学   160074篇
口腔科学   30550篇
临床医学   110249篇
内科学   213522篇
皮肤病学   24800篇
神经病学   85524篇
特种医学   44528篇
外国民族医学   373篇
外科学   166210篇
综合类   59256篇
现状与发展   49篇
一般理论   394篇
预防医学   91743篇
眼科学   26187篇
药学   89211篇
  192篇
中国医学   14617篇
肿瘤学   65954篇
  2021年   14525篇
  2020年   10555篇
  2019年   11899篇
  2018年   15608篇
  2017年   13385篇
  2016年   14208篇
  2015年   18315篇
  2014年   23829篇
  2013年   31819篇
  2012年   43137篇
  2011年   46031篇
  2010年   30013篇
  2009年   27083篇
  2008年   39537篇
  2007年   40761篇
  2006年   40617篇
  2005年   37817篇
  2004年   34692篇
  2003年   33235篇
  2002年   31298篇
  2001年   50300篇
  2000年   50615篇
  1999年   42236篇
  1998年   12322篇
  1997年   11184篇
  1996年   11020篇
  1995年   10550篇
  1994年   9686篇
  1993年   8852篇
  1992年   32625篇
  1991年   31765篇
  1990年   31283篇
  1989年   30089篇
  1988年   27346篇
  1987年   27501篇
  1986年   25563篇
  1985年   24702篇
  1984年   18451篇
  1983年   15552篇
  1982年   9312篇
  1979年   16897篇
  1978年   12232篇
  1977年   10331篇
  1976年   9770篇
  1975年   10188篇
  1974年   12336篇
  1973年   11870篇
  1972年   10893篇
  1971年   10120篇
  1970年   9384篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
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   
92.
93.
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   
94.
95.
日间手术在国外已有上百年的发展历史,现已成为欧美国家重要手术模式。我国于20世纪初开始开展日间手术,但目前尚未普及,发展不平衡问题比较突出,存在认识不清、开展不规范、与医保支付对接不畅等问题。日间手术是一种使国家、医院和病人三方均受益的新型手术模式。近年来,国家相关管理部门积极引导,开展日间手术的医院明显增多,可以预见,我国日间手术即将进入快速发展的新阶段。因此,有条件的医院可以从简单、易操作的病种开始,落实临床路径,积累经验,再逐步稳妥展开。在保证质量的前提下,不断拓展日间手术范围,提高三、四级手术比例。同时,积极与医保支付政策对接,采取灵活的方式,获得医保的支持,更好地促进我国日间手术的快速发展。  相似文献   
96.
97.
98.
99.
100.
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