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   743篇
  免费   30篇
  国内免费   6篇
耳鼻咽喉   2篇
儿科学   42篇
妇产科学   18篇
基础医学   64篇
口腔科学   32篇
临床医学   51篇
内科学   127篇
皮肤病学   19篇
神经病学   12篇
特种医学   164篇
外科学   28篇
综合类   12篇
预防医学   21篇
眼科学   3篇
药学   23篇
中国医学   1篇
肿瘤学   160篇
  2021年   10篇
  2020年   5篇
  2019年   6篇
  2018年   13篇
  2017年   4篇
  2016年   3篇
  2015年   11篇
  2014年   28篇
  2013年   24篇
  2012年   14篇
  2011年   13篇
  2010年   41篇
  2009年   43篇
  2008年   28篇
  2007年   25篇
  2006年   25篇
  2005年   14篇
  2004年   17篇
  2003年   14篇
  2002年   12篇
  2001年   16篇
  2000年   15篇
  1999年   18篇
  1998年   28篇
  1997年   39篇
  1996年   50篇
  1995年   34篇
  1994年   27篇
  1993年   36篇
  1991年   6篇
  1990年   13篇
  1989年   10篇
  1988年   11篇
  1987年   18篇
  1986年   21篇
  1985年   9篇
  1984年   7篇
  1983年   4篇
  1982年   18篇
  1981年   6篇
  1980年   8篇
  1979年   3篇
  1977年   9篇
  1976年   8篇
  1975年   7篇
  1973年   1篇
  1972年   1篇
  1971年   1篇
  1968年   1篇
  1966年   1篇
排序方式: 共有779条查询结果,搜索用时 10 毫秒
21.

Introduction

In 2009 the Department of Health instructed McKinsey & Company to provide advice on how commissioners might achieve world class National Health Service productivity. Asymptomatic inguinal hernia repair was identified as a potentially cosmetic procedure, with limited clinical benefit. The Birmingham and Solihull primary care trust cluster introduced a policy of watchful waiting for asymptomatic inguinal hernia, which was implemented across the health economy in December 2010. This retrospective cohort study aimed to examine the effect of a change in clinical commissioning policy concerning elective surgical repair of asymptomatic inguinal hernias.

Methods

A total of 1,032 patients undergoing inguinal hernia repair in the 16 months after the policy change were compared with 978 patients in the 16 months before. The main outcome measure was relative proportion of emergency repair in groups before and after the policy change. Multivariate binary logistic regression was used to adjust the main outcome for age, sex and hernia type.

Results

The period after the policy change was associated with 59% higher odds of emergency repair (3.6% vs 5.5%, adjusted odds ratio [OR]: 1.59, 95% confidence interval [CI]: 1.03–2.47). In turn, emergency repair was associated with higher odds of adverse events (4.7% vs 18.5%, adjusted OR: 3.68, 95% CI: 2.04–6.63) and mortality (0.1% vs 5.4%, p<0.001, Fisher’s exact test).

Conclusions

Introduction of a watchful waiting policy for asymptomatic inguinal hernias was associated with a significant increase in need for emergency repair, which was in turn associated with an increased risk of adverse events. Current policies may be placing patients at risk.  相似文献   
22.
Heritable somatic methylation and inactivation of MSH2 in families with Lynch syndrome due to deletion of the 3' exons of TACSTD1
Ligtenberg et al. (2009)
Nature Genetics 41: 112–117  相似文献   
23.
Bisphosphonates (BP) prevent, reduce, and delay cancer-related skeletal complications in patients, and have substantially decreased the prevalence of such events since their introduction. Today, a broad range of BP with differences in potency, efficacy, dosing, and administration as well as approved indications is available. In addition, results of clinical trials investigating the efficacy of BP in cancer treatment-induced bone loss (CTIBL) have been recently published. The purpose of this paper is to review the current evidence on the use of BP in solid tumours and provide clinical recommendations. An interdisciplinary expert panel of clinical oncologists and of specialists in metabolic bone diseases assessed the widespread evidence and information on the efficacy of BP in the metastatic and nonmetastatic setting, as well as ongoing research on the adjuvant use of BP. Based on available evidence, the panel recommends amino-bisphosphonates for patients with metastatic bone disease from breast cancer and zoledronic acid for patients with other solid tumours as primary disease. Dosing of BP should follow approved indications with adjustments if necessary. While i.v. administration is most often preferable, oral administration (clodronate, IBA) may be considered for breast cancer patients who cannot or do not need to attend regular hospital care. Early-stage cancer patients at risk of developing CTIBL should be considered for preventative BP treatment. The strongest evidence in this setting is now available for ZOL. Overall, BP are well-tolerated, and most common adverse events are influenza-like syndrome, arthralgia, and when used orally, gastrointestinal symptoms. The dose of BP may need to be adapted to renal function and initial creatinine clearance calculation is mandatory according to the panel for use of any BP. Subsequent monitoring is recommended for ZOL and PAM, as described by the regulatory authority guidelines. Patients scheduled to receive BP (mainly every 3-4 weeks i.v.) should have a dental examination and be advised on appropriate measures for reducing the risk of jaw osteonecrosis. BP are well established as supportive therapy to reduce the frequency and severity of skeletal complications in patients with bone metastases from different cancers.  相似文献   
24.
2002年5月1日颁布实施的《中华人民共和国职业病防治法》是规范职业卫生技术服务行为的法律依据。这是职业卫生技术服务工作走上规范化、标准化、法制化的根本保障,是职业卫生技术服务机构参与市场竞争、提高服务质量、促进自身发展的必由之路,也是企业自主选择职业卫生技术服务机构、提高职业危害防治水平、促进经济发展的关键所在。4年多来,我市各级各类职业卫生技术服务机构的发展极不平衡,仪器设备配备水平、人员能力素质与我省同类地区相比也有较大差距。为了解我市职业卫生技术服务机构现状,我们进行了此项调查。  相似文献   
25.
Thirty-seven eligible patients, median age 59 years (range 37-72) and median performance status 1 (0-2), with advanced, untreated, measurable gastric carcinoma were given docetaxel, 100 mg m-2 i.v. over 60 min without premedication, once every 3 weeks. Metastatic sites included the liver in 12 patients and retroperitoneal lymph nodes in 16. Eight of the 33 evaluable patients (24%) achieved a partial remission for a median of 7.5 months (3-11+). An additional 11 patients had stabilisation of disease. The patients received a median of four cycles of docetaxel (range 1-8) for a total of 156 courses. Dose reduction was necessary in 30 cycles; 14 cycles were delayed a mean of 3 days. Haematological toxicity consisted mainly of non-cumulative neutropenia, with a median nadir count of 0.35 x 10(9) l-1 (0.04-1.64) and eight episodes (5%) of leucopenic fever; non-haematological toxicities included alopecia, mild nausea and vomiting and allergic manifestations such as skin rash and pruritus. There were no drug-related deaths. Our data indicate that docetaxel is an active agent in advanced gastric cancer; further clinical investigations seem warranted.  相似文献   
26.
We investigated if orally administered bifidobacteria and/or lactobacilli could be cultured from faeces of infants after antibiotic treatment, when these bacterial species are usually absent. Lyophilized Bifidobacterium longum, strain BB-536, B. breve, strain BB-576, or Lactobacillus acidophilus, strain LAC-343, were used. Doses of 3 x 10(9) cells of one strain, or a mixture of all three strains 3 x 10(9) cells each were fed three times daily at mealtimes to 11 infants aged 0-8 weeks. Treatment was started the first day after antibiotic treatment and was continued for 5 days. The bacterial species were isolated in 9 of 11, 7 of 10 and 2 of 9 specimens obtained on the last day of bifidobacteria or lactobacilli administration, 5 and 15 days thereafter, respectively. No side effects were noted.  相似文献   
27.
28.
29.
30.
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