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   790584篇
  免费   55420篇
  国内免费   2014篇
耳鼻咽喉   10177篇
儿科学   25882篇
妇产科学   19731篇
基础医学   121974篇
口腔科学   21949篇
临床医学   70774篇
内科学   153077篇
皮肤病学   17910篇
神经病学   57406篇
特种医学   29125篇
外国民族医学   98篇
外科学   116548篇
综合类   16390篇
现状与发展   2篇
一般理论   205篇
预防医学   56329篇
眼科学   17694篇
药学   61005篇
  5篇
中国医学   2833篇
肿瘤学   48904篇
  2021年   7021篇
  2019年   6884篇
  2018年   9618篇
  2017年   7485篇
  2016年   8267篇
  2015年   9254篇
  2014年   12501篇
  2013年   18668篇
  2012年   24875篇
  2011年   26044篇
  2010年   15683篇
  2009年   14545篇
  2008年   23991篇
  2007年   25709篇
  2006年   25891篇
  2005年   24260篇
  2004年   24164篇
  2003年   22965篇
  2002年   22536篇
  2001年   39629篇
  2000年   40137篇
  1999年   33012篇
  1998年   8921篇
  1997年   7463篇
  1996年   7709篇
  1995年   7338篇
  1994年   6718篇
  1993年   6208篇
  1992年   24551篇
  1991年   24492篇
  1990年   23660篇
  1989年   23373篇
  1988年   21231篇
  1987年   20489篇
  1986年   19518篇
  1985年   18243篇
  1984年   13390篇
  1983年   11390篇
  1982年   6344篇
  1979年   12050篇
  1978年   8504篇
  1977年   7170篇
  1976年   6906篇
  1975年   7668篇
  1974年   8942篇
  1973年   8566篇
  1972年   8053篇
  1971年   7485篇
  1970年   7202篇
  1969年   6641篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
73.
74.
In both adults and children with diabetes, technologies such as continuous subcutaneous insulin infusion using insulin pumps and continuous glucose monitoring can help improve diabetes control, reduce hypoglycaemia and improve quality of life. Access to these technologies in the UK is very variable. Some technologies are recommended by the National Institute for Health and Care Excellence, while others have not been appraised, and new technologies are emerging all the time. Additionally, different guidelines for adults and children further complicate access to diabetes technology in the transition from paediatric to adult care. Against this background, Diabetes UK and NHS England have brought together a multidisciplinary group of experts, including clinicians and people with diabetes, to develop this consensus guideline, combining the different technologies into a common pathway to aid clinical and policy decision‐making. We created a pathway that supports the incremental addition of technology as monotherapy and then dual therapy in the same way that we incrementally add in therapeutic agents to support people with Type 2 diabetes to achieve their personalized glycaemic targets. The pathway emphasizes the importance of structured education, specialist support and appropriate access to psychological therapies, as essential pillars for optimized use of diabetes‐related technology, and recommends the re‐evaluation of its use when the individual is unable either to use the technology appropriately or to achieve the intended outcomes. This pathway is endorsed by UK‐wide clinical and patient associations and we recommend that providers and commissioners use it to ensure the right individual with diabetes has access to the right technology in a timely way to help achieve better outcomes.  相似文献   
75.

Purpose

A hydrogel rectal spacer (HRS) is a medical device that is approved by the U.S. Food and Drug Administration to increase the separation between the prostate and rectum. We conducted a cost-effectiveness analysis of HRS use for reduction in radiation therapy (RT) toxicities in patients with prostate cancer (PC) undergoing external beam RT (EBRT).

Methods and Materials

A multistate Markov model was constructed from the U.S. payer perspective to examine the cost-effectiveness of HRS in men with localized PC receiving EBRT (EBRT alone vs EBRT + HRS). The subgroups analyzed included site of HRS placement (hospital outpatient, physician office, ambulatory surgery center) and proportion of patients with good baseline erectile function (EF). Data on EF, gastrointestinal and genitourinary toxicities incidence, and potential risks associated with HRS implantation were obtained from a recently published randomized clinical trial. Health utilities and costs were derived from the literature and the 2018 Physician Fee Schedule and were discounted 3% annually. Quality-adjusted life years (QALYs) and costs were modeled for a 5-year period from receipt of RT. Probabilistic sensitivity analysis and value-based threshold analyses were conducted.

Results

The per-patient 5-year incremental cost for spacers administered in a hospital outpatient setting was $3578, and the incremental effectiveness was 0.0371 QALYs. The incremental cost-effectiveness ratio was $96,440/QALY for patients with PC undergoing HRS insertion in a hospital and $39,286/QALY for patients undergoing HRS insertion in an ambulatory facility. For men with good baseline EF, the incremental cost-effectiveness ratio was $35,548/QALY and $9627/QALY in hospital outpatient and ambulatory facility settings, respectively.

Conclusions

Based on the current Medicare Physician Fee Schedule, HRS is cost-effective at a willingness to pay threshold of $100,000. These results contain substantial uncertainty, suggesting more evidence is needed to refine future decision-making.  相似文献   
76.
77.
78.
79.
Bulletin of Experimental Biology and Medicine - Fast neutron therapy, which previously has demonstrated effective results, but along with a large number of complications, can again be considered a...  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