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   3094432篇
  免费   239916篇
  国内免费   5477篇
耳鼻咽喉   45039篇
儿科学   102420篇
妇产科学   87729篇
基础医学   440767篇
口腔科学   89799篇
临床医学   274631篇
内科学   596476篇
皮肤病学   66207篇
神经病学   248829篇
特种医学   122558篇
外国民族医学   1217篇
外科学   471576篇
综合类   76863篇
现状与发展   6篇
一般理论   1065篇
预防医学   242280篇
眼科学   73437篇
药学   231794篇
  6篇
中国医学   5954篇
肿瘤学   161172篇
  2018年   30104篇
  2016年   25789篇
  2015年   29652篇
  2014年   41597篇
  2013年   63710篇
  2012年   86376篇
  2011年   91360篇
  2010年   54387篇
  2009年   51274篇
  2008年   86874篇
  2007年   92784篇
  2006年   93195篇
  2005年   91048篇
  2004年   89197篇
  2003年   85695篇
  2002年   83655篇
  2001年   138507篇
  2000年   143205篇
  1999年   121725篇
  1998年   34956篇
  1997年   31550篇
  1996年   31525篇
  1995年   30231篇
  1994年   28574篇
  1993年   26795篇
  1992年   99522篇
  1991年   97194篇
  1990年   95143篇
  1989年   91446篇
  1988年   85234篇
  1987年   83905篇
  1986年   79410篇
  1985年   76647篇
  1984年   58030篇
  1983年   49794篇
  1982年   30029篇
  1981年   27150篇
  1980年   25132篇
  1979年   55740篇
  1978年   39346篇
  1977年   33198篇
  1976年   31102篇
  1975年   33486篇
  1974年   40618篇
  1973年   39092篇
  1972年   36414篇
  1971年   33878篇
  1970年   31637篇
  1969年   29815篇
  1968年   27157篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
112.
113.
114.
115.
116.
117.
118.
Coronavirus disease 2019 (COVID-19) has resulted in many challenges in patient care, especially among high-risk populations such as heart transplant recipients. Patients with heart transplant experience a significantly higher mortality rate with COVID-19 infection, and management is based on extrapolation from clinical trials done on nontransplant patients and from clinical experience. Here we report 4 cases of patients with heart transplant who presented with COVID-19 infection in late 2020. Patients presented with symptoms similar to those seen in the general population. All 4 patients were admitted to the hospital, and they were all treated with dexamethasone. In addition, 2 patients received remdesivir. Immunosuppressive medications were adjusted to maintain adequate levels of immunosuppression but at the same time allow for an adequate immune response against the infection. All patients were discharged alive from the hospital. We then performed a literature review on studies that included heart transplant patients who developed the infection and developed suggestions for a standardized management approach, which we share in this article.  相似文献   
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