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   1107609篇
  免费   84253篇
  国内免费   3054篇
耳鼻咽喉   14160篇
儿科学   37866篇
妇产科学   30421篇
基础医学   160254篇
口腔科学   29815篇
临床医学   101451篇
内科学   217007篇
皮肤病学   24230篇
神经病学   89887篇
特种医学   41863篇
外国民族医学   305篇
外科学   165446篇
综合类   25231篇
现状与发展   1篇
一般理论   536篇
预防医学   87669篇
眼科学   25604篇
药学   79881篇
  4篇
中国医学   2283篇
肿瘤学   61002篇
  2021年   8979篇
  2019年   9463篇
  2018年   13107篇
  2017年   10072篇
  2016年   11494篇
  2015年   13023篇
  2014年   17964篇
  2013年   27081篇
  2012年   36568篇
  2011年   39039篇
  2010年   22971篇
  2009年   21631篇
  2008年   36053篇
  2007年   38179篇
  2006年   38259篇
  2005年   37011篇
  2004年   35818篇
  2003年   34170篇
  2002年   32932篇
  2001年   48005篇
  2000年   48832篇
  1999年   41411篇
  1998年   12486篇
  1997年   11222篇
  1996年   11014篇
  1995年   10644篇
  1994年   9839篇
  1993年   9202篇
  1992年   32864篇
  1991年   32031篇
  1990年   31507篇
  1989年   30348篇
  1988年   27635篇
  1987年   27777篇
  1986年   25835篇
  1985年   25076篇
  1984年   18928篇
  1983年   16002篇
  1982年   9948篇
  1981年   8943篇
  1979年   17209篇
  1978年   12528篇
  1977年   10652篇
  1976年   10007篇
  1975年   10430篇
  1974年   12574篇
  1973年   12102篇
  1972年   11068篇
  1971年   10260篇
  1970年   9492篇
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
71.
72.
73.
74.
Clinical Rheumatology - Prof. Ari Polachek on of the author of the published version of this article missed to add his second affiliation which is the Department of Rheumatology, Tel Aviv Sourasky...  相似文献   
75.
76.
Contrast‐enhanced spectral mammography (CESM) has a number of uses including the work‐up of inconclusive findings on mammography, assessment of breast symptoms, cancer staging, evaluation of response to neoadjuvant chemotherapy and recently as an alternative to magnetic resonance imaging (MRI) in high‐risk screening. CESM can be swiftly incorporated into the workflow of busy breast clinics. We share our experiences with CESM at a large breast assessment centre in Western Australia.  相似文献   
77.
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   
78.
79.
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   
80.
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