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   1014510篇
  免费   78150篇
  国内免费   2638篇
耳鼻咽喉   13162篇
儿科学   35140篇
妇产科学   28947篇
基础医学   147841篇
口腔科学   28294篇
临床医学   92442篇
内科学   197074篇
皮肤病学   23171篇
神经病学   80578篇
特种医学   39089篇
外国民族医学   305篇
外科学   152011篇
综合类   24044篇
一般理论   426篇
预防医学   79677篇
眼科学   22881篇
药学   73028篇
  4篇
中国医学   2042篇
肿瘤学   55142篇
  2018年   10889篇
  2017年   8522篇
  2016年   9670篇
  2015年   10943篇
  2014年   14913篇
  2013年   22670篇
  2012年   29943篇
  2011年   31864篇
  2010年   19051篇
  2009年   17895篇
  2008年   29696篇
  2007年   31463篇
  2006年   31884篇
  2005年   30565篇
  2004年   29736篇
  2003年   28589篇
  2002年   27500篇
  2001年   47408篇
  2000年   48492篇
  1999年   40640篇
  1998年   11374篇
  1997年   10266篇
  1996年   10340篇
  1995年   9961篇
  1994年   9260篇
  1993年   8623篇
  1992年   32608篇
  1991年   31788篇
  1990年   31332篇
  1989年   30209篇
  1988年   27474篇
  1987年   27597篇
  1986年   25678篇
  1985年   24883篇
  1984年   18624篇
  1983年   15727篇
  1982年   9424篇
  1981年   8487篇
  1979年   17036篇
  1978年   12371篇
  1977年   10438篇
  1976年   9882篇
  1975年   10312篇
  1974年   12450篇
  1973年   12006篇
  1972年   11022篇
  1971年   10229篇
  1970年   9478篇
  1969年   8813篇
  1968年   8184篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
63.
64.
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   
65.
66.
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   
67.
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   
68.
69.
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   
70.
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