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   912894篇
  免费   76840篇
  国内免费   5546篇
耳鼻咽喉   13294篇
儿科学   25056篇
妇产科学   25563篇
基础医学   129492篇
口腔科学   26240篇
临床医学   81979篇
内科学   171585篇
皮肤病学   17344篇
神经病学   72569篇
特种医学   37202篇
外国民族医学   193篇
外科学   141798篇
综合类   35113篇
现状与发展   8篇
一般理论   269篇
预防医学   70854篇
眼科学   21974篇
药学   70365篇
  62篇
中国医学   5185篇
肿瘤学   49135篇
  2021年   8001篇
  2018年   9273篇
  2016年   8302篇
  2015年   10354篇
  2014年   14352篇
  2013年   19898篇
  2012年   27404篇
  2011年   28632篇
  2010年   17288篇
  2009年   15780篇
  2008年   25529篇
  2007年   27504篇
  2006年   27127篇
  2005年   26510篇
  2004年   25214篇
  2003年   24160篇
  2002年   23008篇
  2001年   36623篇
  2000年   37151篇
  1999年   31619篇
  1998年   9645篇
  1997年   8971篇
  1996年   8829篇
  1995年   8302篇
  1994年   7985篇
  1992年   26805篇
  1991年   26231篇
  1990年   25755篇
  1989年   24773篇
  1988年   23313篇
  1987年   22966篇
  1986年   21815篇
  1985年   21155篇
  1984年   16430篇
  1983年   14027篇
  1982年   8869篇
  1981年   8215篇
  1979年   16751篇
  1978年   12121篇
  1977年   10184篇
  1976年   9330篇
  1975年   10150篇
  1974年   12650篇
  1973年   12144篇
  1972年   11543篇
  1971年   10687篇
  1970年   10224篇
  1969年   9917篇
  1968年   8901篇
  1967年   8232篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
61.
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   
62.
63.
64.
65.
66.
67.
肠易激综合征(IBS)是一种常见的功能性疾病,中医病名为"肠郁"。郭朋教授根据IBS生理、病理特点,以疏肝健脾法调和肝脾,辨证施治,取得良好疗效。文章从病因病机、辨证论治及经典案例介绍等几个方面对郭教授治疗IBS经验进行系统阐述,以期为中医药治疗IBS提供理论和方法学参考。  相似文献   
68.
69.
70.
The aim of this study was to analyse the effect of body mass index (BMI), both low and high values, on the perioperative complication rate in patients with oral squamous cell carcinoma (OSCC). The medical records of 259 patients operated between 2014 and 2017 for OSCC were reviewed. Univariate and multivariate analyses were performed. Sixty of the 259 patients developed 87 complications. Low or high BMI was not associated with the perioperative complication rate. A longer operating time and increased blood loss were associated with a higher perioperative complication rate and higher Clavien–Dindo grade. Low BMI, American Society of Anesthesiologists score 2 and 3, a longer operating time, and increased blood loss were associated with a longer hospital stay. Low BMI was associated with a longer hospital stay. Neither low nor high BMI was associated with the perioperative complication rate. A longer operating time and increased blood loss were associated with a higher perioperative complication rate and higher Clavien–Dindo grade.  相似文献   
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