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   2075903篇
  免费   155070篇
  国内免费   4263篇
耳鼻咽喉   28982篇
儿科学   70259篇
妇产科学   59906篇
基础医学   302503篇
口腔科学   58624篇
临床医学   183047篇
内科学   403264篇
皮肤病学   45395篇
神经病学   163209篇
特种医学   80849篇
外国民族医学   652篇
外科学   316130篇
综合类   46621篇
现状与发展   1篇
一般理论   660篇
预防医学   158242篇
眼科学   48034篇
药学   154674篇
  4篇
中国医学   4070篇
肿瘤学   110110篇
  2018年   20524篇
  2016年   17831篇
  2015年   20308篇
  2014年   27956篇
  2013年   42791篇
  2012年   57446篇
  2011年   61542篇
  2010年   36723篇
  2009年   34548篇
  2008年   58670篇
  2007年   62970篇
  2006年   64035篇
  2005年   62029篇
  2004年   60106篇
  2003年   58216篇
  2002年   56842篇
  2001年   93797篇
  2000年   96032篇
  1999年   81212篇
  1998年   23252篇
  1997年   20850篇
  1996年   21030篇
  1995年   20039篇
  1994年   18893篇
  1993年   17520篇
  1992年   65727篇
  1991年   64660篇
  1990年   63857篇
  1989年   61799篇
  1988年   57039篇
  1987年   56544篇
  1986年   53408篇
  1985年   51280篇
  1984年   38486篇
  1983年   33026篇
  1982年   19812篇
  1981年   17683篇
  1980年   16563篇
  1979年   36131篇
  1978年   25773篇
  1977年   22056篇
  1976年   20935篇
  1975年   22470篇
  1974年   26779篇
  1973年   25859篇
  1972年   24212篇
  1971年   22621篇
  1970年   20992篇
  1969年   19926篇
  1968年   18622篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
112.
113.
Hypertrophic lichen planus (HLP) is a T‐cell‐mediated process typically presenting with hypertrophic or verrucous plaques on the lower limbs. We report the case of a 24‐year‐old woman with a history of HLP since age 3 years presenting with rapid malignant transformation of one lesion into a large squamous cell carcinoma (SCC). Subsequent examination revealed progressive, widespread metastatic involvement, and the patient ultimately died from her disease. SCC associated with HLP is rare, with a review of the literature revealing fewer than 50 cases. This case highlights the need to be aware of suspicious changes in HLP and to educate patients as to when to be reevaluated.  相似文献   
114.
115.
116.
117.
118.
119.
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   
120.
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