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   2100810篇
  免费   157893篇
  国内免费   17116篇
耳鼻咽喉   27020篇
儿科学   62983篇
妇产科学   54802篇
基础医学   294449篇
口腔科学   59873篇
临床医学   194407篇
内科学   404858篇
皮肤病学   45902篇
神经病学   157779篇
特种医学   78227篇
外国民族医学   414篇
外科学   311621篇
综合类   74262篇
现状与发展   44篇
一般理论   597篇
预防医学   147224篇
眼科学   51162篇
药学   162172篇
  197篇
中国医学   16711篇
肿瘤学   131115篇
  2021年   24095篇
  2020年   16276篇
  2019年   21399篇
  2018年   29060篇
  2017年   23069篇
  2016年   24213篇
  2015年   29806篇
  2014年   39834篇
  2013年   51842篇
  2012年   72610篇
  2011年   76624篇
  2010年   46201篇
  2009年   41673篇
  2008年   67001篇
  2007年   70369篇
  2006年   70283篇
  2005年   66969篇
  2004年   61538篇
  2003年   58298篇
  2002年   55346篇
  2001年   109792篇
  2000年   112347篇
  1999年   93753篇
  1998年   25120篇
  1997年   22170篇
  1996年   21400篇
  1995年   20565篇
  1994年   18634篇
  1993年   16672篇
  1992年   68079篇
  1991年   65227篇
  1990年   62407篇
  1989年   60135篇
  1988年   54538篇
  1987年   52998篇
  1986年   49491篇
  1985年   46796篇
  1984年   34044篇
  1983年   28743篇
  1982年   15774篇
  1979年   29417篇
  1978年   19990篇
  1977年   17109篇
  1976年   15556篇
  1975年   16519篇
  1974年   19937篇
  1973年   19097篇
  1972年   17817篇
  1971年   16579篇
  1970年   15311篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
151.
TL1A is a TNF‐like cytokine which has been shown to co‐stimulate TH1 and TH17 responses during chronic inflammation. The expression of this novel cytokine has been investigated in inflammatory disorders like rheumatoid arthritis and inflammatory bowel disease, but little is known about expression and induction in psoriasis. Indeed, the pathogenesis in psoriasis is still not fully understood and it is speculated that cytokines other than TNF‐α are important in subsets of patients. Also, for patients with severe disease that are treated with systemic anti‐TNF‐α blockade, novel candidates to be used as disease and response biomarkers are of high interest. Here, we demonstrate TL1A expression in biopsies from psoriatic lesions. Also, we investigated spontaneous and induced TL1A secretion from PBMCs and blood levels from a cohort of psoriasis patients. Here, increased spontaneous secretion from PBMCs was observed as compared to healthy controls and a small subset of patients had highly elevated TL1A in the blood. Interestingly, activation of PBMCs with various cytokines showed a decreased sensitivity for TL1A activation in psoriasis patients compared to healthy controls.TL1A levels in blood and biopsies could not be correlated with disease activity with this patient cohort. Thus, additional large‐scale studies are warranted to investigate TL1A as a biomarker.  相似文献   
152.
153.
154.
155.
156.
157.
158.
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   
159.
160.
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