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   1280170篇
  免费   92710篇
  国内免费   1995篇
耳鼻咽喉   18244篇
儿科学   42331篇
妇产科学   37854篇
基础医学   187477篇
口腔科学   35449篇
临床医学   108559篇
内科学   252221篇
皮肤病学   26516篇
神经病学   99508篇
特种医学   50239篇
外国民族医学   366篇
外科学   197883篇
综合类   26563篇
现状与发展   1篇
一般理论   301篇
预防医学   92892篇
眼科学   29100篇
药学   97968篇
  1篇
中国医学   2501篇
肿瘤学   68901篇
  2018年   11864篇
  2015年   11675篇
  2014年   16079篇
  2013年   24453篇
  2012年   33674篇
  2011年   36090篇
  2010年   21292篇
  2009年   20108篇
  2008年   35145篇
  2007年   38110篇
  2006年   38675篇
  2005年   37959篇
  2004年   36540篇
  2003年   35506篇
  2002年   35030篇
  2001年   58228篇
  2000年   59697篇
  1999年   50782篇
  1998年   14283篇
  1997年   12845篇
  1996年   13121篇
  1995年   12374篇
  1994年   11784篇
  1993年   10885篇
  1992年   41042篇
  1991年   40430篇
  1990年   39963篇
  1989年   38769篇
  1988年   36154篇
  1987年   35408篇
  1986年   33771篇
  1985年   32186篇
  1984年   23959篇
  1983年   20850篇
  1982年   12400篇
  1981年   10943篇
  1980年   10220篇
  1979年   22653篇
  1978年   15899篇
  1977年   13752篇
  1976年   12992篇
  1975年   14216篇
  1974年   16720篇
  1973年   16095篇
  1972年   15335篇
  1971年   14245篇
  1970年   13229篇
  1969年   12747篇
  1968年   11995篇
  1967年   10490篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
BackgroundThe aim of this paper is to assess the current state of quality and outcomes measures being reported for hepatic resections in the recent literature.MethodsMedline and PubMed databases were searched for English language articles published between 1 January 2002 and 30 April 2013. Two examiners reviewed each article and relevant citations for appropriateness of inclusion, which excluded papers of liver donor hepatic resections, repeat hepatectomies or meta-analyses. Data were extracted and summarized by two examiners for analysis.ResultsFifty-five studies were identified with suitable reporting to assess peri-operative mortality in hepatic resections. In only 35% (19/55) of the studies was the follow-up time explicitly stated, and in 47% (26/55) of studies peri-operative mortality was limited to in-hospital or 30 days. The time period in which complications were captured was not explicitly stated in 19 out of 28 studies. The remaining studies only captured complications within 30 days of the index operation (8/28). There was a paucity of quality literature addressing truly patient-centred outcomes.ConclusionQuality outcomes after a hepatic resection are inconsistently reported in the literature. Quality outcome studies for a hepatectomy should report mortality and morbidity at a minimum of 90 days after surgery.  相似文献   
33.
34.
35.
36.
37.
38.
39.
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   
40.
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