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   244624篇
  免费   37422篇
  国内免费   2730篇
耳鼻咽喉   6095篇
儿科学   7725篇
妇产科学   4089篇
基础医学   15293篇
口腔科学   3190篇
临床医学   36469篇
内科学   65818篇
皮肤病学   8637篇
神经病学   24280篇
特种医学   10014篇
外国民族医学   3篇
外科学   55915篇
综合类   1309篇
现状与发展   72篇
一般理论   131篇
预防医学   14940篇
眼科学   5322篇
药学   7314篇
中国医学   111篇
肿瘤学   18049篇
  2024年   731篇
  2023年   5209篇
  2022年   2051篇
  2021年   5028篇
  2020年   7159篇
  2019年   4136篇
  2018年   9682篇
  2017年   8898篇
  2016年   10095篇
  2015年   10398篇
  2014年   18499篇
  2013年   19836篇
  2012年   12748篇
  2011年   13147篇
  2010年   14556篇
  2009年   17900篇
  2008年   12619篇
  2007年   11219篇
  2006年   13395篇
  2005年   10422篇
  2004年   9560篇
  2003年   7888篇
  2002年   7649篇
  2001年   4508篇
  2000年   3458篇
  1999年   3988篇
  1998年   4723篇
  1997年   4257篇
  1996年   3997篇
  1995年   3792篇
  1994年   2471篇
  1993年   2098篇
  1992年   1767篇
  1991年   1750篇
  1990年   1348篇
  1989年   1437篇
  1988年   1261篇
  1987年   1116篇
  1986年   1099篇
  1985年   980篇
  1984年   831篇
  1983年   765篇
  1982年   838篇
  1981年   674篇
  1980年   576篇
  1979年   396篇
  1978年   453篇
  1977年   498篇
  1975年   342篇
  1972年   346篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
53.
Multimodality primary therapies for breast cancer combined with earlier detection have led to a sharp decline in the death rate from breast cancer in the UK over the last 40 years in the face of a rising incidence. The latest UK statistics from Cancer Research UK report 55,122 new cases of breast cancer in 2015 with 11,563 deaths from breast cancer recorded in 2016. Crudely, this equates to a cure rate of around 80% for all comers and demonstrates a clear improvement in outcome with 50,285 new cases in 2011 and 11,716 deaths in 2012. Despite this good news, there are still significant numbers of women (and men) who suffer from either a local recurrence or metastatic disease following apparently successful treatment for early breast cancer (Stage I to III). Only a minority of individuals, 6.6% with the stage recorded at diagnosis, present with stage IV disease. This review considers the treatment options available to individuals with locally recurrent and advanced breast cancer (ABC).  相似文献   
54.
55.
56.
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   
57.
Breast elastography has been available for more than 15 years but is not widely incorporated into clinical practice. Many publications report extremely high accuracy for various breast elastographic techniques. However, results in the literature are extremely variable. This variability is most likely due to variations in technique, a relatively steep learning curve, and variability in methods between vendors. This article describes our protocol for performing breast elastography using both strain elastography and shear wave elastography, which produces high sensitivity and specificity. Additionally, we will describe the most commonly known false-positive and false-negative lesions as well as how to detect them.  相似文献   
58.
59.
60.
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