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   1112758篇
  免费   82663篇
  国内免费   2712篇
耳鼻咽喉   14961篇
儿科学   38481篇
妇产科学   31314篇
基础医学   163692篇
口腔科学   31550篇
临床医学   99978篇
内科学   213965篇
皮肤病学   26314篇
神经病学   91042篇
特种医学   43619篇
外国民族医学   305篇
外科学   166625篇
综合类   24230篇
一般理论   419篇
预防医学   84314篇
眼科学   25324篇
药学   79989篇
  3篇
中国医学   2209篇
肿瘤学   59799篇
  2019年   8472篇
  2018年   13041篇
  2017年   10333篇
  2016年   12167篇
  2015年   12994篇
  2014年   16994篇
  2013年   26650篇
  2012年   34914篇
  2011年   37603篇
  2010年   22256篇
  2009年   19938篇
  2008年   35583篇
  2007年   37658篇
  2006年   37839篇
  2005年   36417篇
  2004年   35323篇
  2003年   34220篇
  2002年   33141篇
  2001年   50676篇
  2000年   52818篇
  1999年   42936篇
  1998年   12340篇
  1997年   11023篇
  1996年   10916篇
  1995年   10380篇
  1994年   9687篇
  1993年   9044篇
  1992年   32807篇
  1991年   31963篇
  1990年   31495篇
  1989年   30389篇
  1988年   27605篇
  1987年   27798篇
  1986年   25823篇
  1985年   25177篇
  1984年   18941篇
  1983年   15981篇
  1982年   9803篇
  1981年   8881篇
  1979年   17262篇
  1978年   12608篇
  1977年   10767篇
  1976年   10142篇
  1975年   10570篇
  1974年   12679篇
  1973年   12159篇
  1972年   11152篇
  1971年   10403篇
  1970年   9645篇
  1969年   8956篇
排序方式: 共有10000条查询结果,搜索用时 15 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