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   20088篇
  免费   1791篇
  国内免费   498篇
耳鼻咽喉   206篇
儿科学   376篇
妇产科学   542篇
基础医学   2709篇
口腔科学   414篇
临床医学   2296篇
内科学   3787篇
皮肤病学   371篇
神经病学   1369篇
特种医学   803篇
外国民族医学   3篇
外科学   2514篇
综合类   1206篇
一般理论   4篇
预防医学   1509篇
眼科学   521篇
药学   1700篇
  4篇
中国医学   348篇
肿瘤学   1695篇
  2024年   36篇
  2023年   220篇
  2022年   486篇
  2021年   727篇
  2020年   408篇
  2019年   531篇
  2018年   560篇
  2017年   488篇
  2016年   495篇
  2015年   674篇
  2014年   814篇
  2013年   930篇
  2012年   1483篇
  2011年   1551篇
  2010年   897篇
  2009年   748篇
  2008年   1141篇
  2007年   1130篇
  2006年   1069篇
  2005年   1026篇
  2004年   945篇
  2003年   808篇
  2002年   704篇
  2001年   504篇
  2000年   423篇
  1999年   423篇
  1998年   185篇
  1997年   174篇
  1996年   196篇
  1995年   170篇
  1994年   130篇
  1993年   114篇
  1992年   215篇
  1991年   199篇
  1990年   178篇
  1989年   149篇
  1988年   138篇
  1987年   120篇
  1986年   120篇
  1985年   119篇
  1984年   103篇
  1983年   86篇
  1982年   76篇
  1981年   77篇
  1980年   65篇
  1979年   75篇
  1978年   63篇
  1977年   43篇
  1975年   38篇
  1974年   54篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
11.
12.
13.

Purpose

To evaluate the feasibility of a same-day yttrium-90 (90Y) radioembolization protocol with resin microspheres (including pretreatment angiography, lung shunt fraction [LSF] determination, and radioembolization) for the treatment of hepatocellular carcinoma (HCC) and liver metastases.

Materials and Methods

All same-day radioembolization procedures performed over 1 y (February 2017 to January 2018) were included in this single-institutional retrospective analysis, in which 34 procedures were performed in 26 patients (median age, 63 y; 13 women), 19 with liver metastases and 7 with HCC. Yttrium-90 treatment activities were calculated by body surface area method. Tumor imaging response was assessed by Response Evaluation Criteria In Solid Tumors (RECIST) 1.1 for liver metastases and modified RECIST for HCC. Clinical side effects and adverse events were graded per Common Terminology Criteria for Adverse Events version 4.0.

Results

All planned cases were technically successful, and no cases were canceled for elevated LSF or vascular anatomic reasons. Pretreatment angiography modified the planned 90Y treatment activity in 1 case in which vascular anatomy required a lobar-dose split into 2 for segmental infusions. In 18% of cases, patients were briefly admitted after the procedure for observation or symptom management. Imaging evaluation of initial efficacy at 1 month demonstrated partial response in 25% and stable disease in 67% of patients with liver metastases and partial/complete response in 43% and stable disease in 14% of patients with HCC. Grade ≥ 3 adverse events occurred in 6% of cases, with no systemic therapy–limiting toxicities. The mean total procedure time was 4.2 hours.

Conclusions

A same-day 90Y radioembolization protocol with resin microspheres is feasible in select patients, which can expedite cancer therapy.  相似文献   
14.
15.
16.
17.
The purposes of this pilot study were to identify and adapt instruments for future use in assessing diabetes self-management in a sample of Cuban Americans with Type 2 diabetes. Eight instruments were selected from the literature, translated into Spanish, and administered to a sample of 20 Cuban Americans with Type 2 diabetes. Psychometric properties were examined along with clarity of wording, cultural appropriateness, and ease of use. Reliability data were compared, when possible, with original scores generated with non-Cuban populations. Results indicated that reliability scores among populations were similar. Support for using these instruments in clinical practice to assess initial knowledge and beliefs about aspects of diabetes management and to monitor changes is provided.  相似文献   
18.
19.
Mycophenolate mofetil (MMF) used in a triple-drug regimen has been shown to decrease acute rejection rates, compared to a double-drug regimen. The impact of MMF on late acute rejection (LAR) episodes has not been well described. To investigate the risk of LAR (rejection > or = 6 months post-transplantation) data from the Scientific Registry of Transplant Recipients (SRTR) were used. We studied adult primary liver transplant recipients transplanted between June 1, 1995, and April 30, 2004, with hepatitis C virus (HCV) (n = 3356), hepatitis B virus (HBV) (n = 550) or a nonviral (n = 5740) primary cause of liver disease who were recorded as receiving continuous 3-(MMF + Tacro + steroids) versus 2-drug (Tacro + steroids) therapy for at least 6 months immediately post transplantation. Kaplan-Meier analysis showed significantly lower LAR rates 4 years post-transplant in 3- versus 2-drug HCV, HBV and nonviral disease patients. Multivariate regression confirmed 3- versus 2-drug therapy to be associated with a decreased risk of LAR. Late graft survival was significantly lower at 4 years post-transplant for patients with LAR 6-12 months post-transplantation versus patients with early rejection (78.0% vs. 87.0%, p < 0.001) and no rejection (88.1%, p < 0.001). Three-drug versus 2-drug therapy for a minimum of 6 months may offer a better treatment strategy to avoid the consequences and expense of LAR episodes.  相似文献   
20.
The use of computer technology for patient education has increased in recent years. This article describes a study that measures the attitudes and perceptions of healthcare professionals and laypeople regarding the effectiveness of a multimedia computer, the Brain Injury Resource Center? (BIRC), as an educational tool. The study focused on three major themes: (a) usefulness of the information presented, (b) effectiveness of the multimedia touch-screen computer methodology, and (c) the appropriate time for making this resource available. This prospective study, conducted in an acute care medical center, obtained healthcare professionals' evaluations using a written survey and responses from patients with brain injury and their families during interviews. The findings have yielded excellent ratings as to the ease of understanding and usefulness of the BIRC. By using sight, sound, and touch, such a multimedia learning center has the potential to simplify patient and family education.  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