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   518篇
  免费   45篇
  国内免费   1篇
耳鼻咽喉   2篇
儿科学   5篇
妇产科学   3篇
基础医学   75篇
口腔科学   19篇
临床医学   51篇
内科学   80篇
皮肤病学   25篇
神经病学   86篇
特种医学   10篇
外科学   76篇
综合类   17篇
预防医学   21篇
眼科学   11篇
药学   49篇
中国医学   2篇
肿瘤学   32篇
  2022年   5篇
  2021年   22篇
  2020年   4篇
  2019年   10篇
  2018年   19篇
  2017年   13篇
  2016年   13篇
  2015年   13篇
  2014年   17篇
  2013年   40篇
  2012年   25篇
  2011年   31篇
  2010年   13篇
  2009年   9篇
  2008年   24篇
  2007年   25篇
  2006年   26篇
  2005年   20篇
  2004年   17篇
  2003年   26篇
  2002年   19篇
  2001年   16篇
  2000年   26篇
  1999年   18篇
  1998年   5篇
  1997年   4篇
  1996年   8篇
  1995年   4篇
  1993年   8篇
  1992年   11篇
  1991年   7篇
  1990年   7篇
  1989年   2篇
  1988年   3篇
  1987年   5篇
  1986年   5篇
  1985年   2篇
  1984年   2篇
  1983年   4篇
  1982年   3篇
  1981年   3篇
  1979年   3篇
  1978年   2篇
  1976年   4篇
  1975年   2篇
  1974年   2篇
  1972年   4篇
  1971年   5篇
  1970年   2篇
  1969年   1篇
排序方式: 共有564条查询结果,搜索用时 515 毫秒
101.
102.
103.
Sze HC  Ng WT  Chan OS  Shum TC  Chan LL  Lee AW 《Oral oncology》2012,48(2):162-167
Elderly patients represent a unique challenge for radical treatment in nasopharyngeal carcinoma (NPC) because of age and co-morbid conditions. We sought to evaluate the outcome of this particular group of patients and to identify key factors affecting treatment outcome. From 1998 to 2008, 990 consecutive NPC patients without distant metastasis were treated with radical radiotherapy with planned total dose >66 Gy. Among them, 103 (10.4%) patients were elderly aged >70 (group A). Their clinical characteristics and outcome were compared with those aged <70 (group B). Mortality at 90 days was used as a proxy of early deaths related to treatment. Co-morbidities were measured by the Adult Co-morbidity Evaluation 27 (ACE-27). Group A presented more commonly with poorer performance status. They showed higher rates of acute reaction, radiotherapy incompletion and mortality at 90 days (7.8% vs. 1.2%, p<0.001). The 5-year overall survival rates were 43.9% and 78.1% for groups A and B, respectively (p<0.001). No difference in failure free survival rates was noted. For group A, ACE-27 was the only predicting factor for mortality at 90 days [ACE-27 2-3 vs. 0-1: HR 15.86 (2.68-93.95), p=0.002], and the most important prognostic factors for overall survival included age, presenting stage and ACE-27 (p<0.05). Elderly NPC patients had poorer tolerance to radiotherapy. Early deaths related to treatment were not uncommon. A reasonable disease control can still be attained after radical radiotherapy for those who were able to survive through the peri-radiotherapy period. Patient selection and treatment approach with reference to ACE-27 should be considered.  相似文献   
104.
The synthesis, antileukemic and antiplatelet activity evaluation of 2,3-diaryl-6,7-dihydro-5H-1,4-diazepines are described. In general, it was found that compound 17o showed moderate antileukemic activity against MOLT3 human leukemic cancer cell lines. An arachidonic acid induced platelet aggregation effect on washed rat platelets was studied. Compound 17i was found to be the most potent. The antiplatelet properties may be mediated by interference with the arachidonic acid pathway.  相似文献   
105.
106.
107.

Purpose

This study applied the social-cognitive processing (SCP) model to examine whether positive (social support) and negative (social constraints) aspects of the social environment influenced emotional distress, quality of life (QoL), well-being, and benefit finding after cancer.

Methods

Participants were 439 adults at a median of 66 weeks post-diagnosis and 79 % of them had completed cancer treatments. Outcome measures and predictors were assessed twice, 6 months apart, and their relationships were analyzed using hierarchical multiple regressions.

Results

Participants reported improved physical QoL at retest. Correlations showed that better outcomes for depression, anxiety, QoL, and well-being were associated with higher social support and lower social constraints. In addition, benefit finding correlated with social support but not social constraints. After other predictors were taken into account, lower initial social constraints were modestly associated with improved mental QoL at retest. Higher social constraints scores also predicted the development of clinically significant depression and anxiety.

Conclusions

Results provided some support for the SCP model’s prediction that both positive and negative aspects of social environment can contribute to adjustment in people with cancer. Although several findings supported the model, a heterogeneous sample and small effect sizes indicate that replication and further study is needed.  相似文献   
108.
An innovative anti‐osteoporosis herbal formula containing Epimedii Herba, Ligustri Lucidi Fructus and Psoraleae Fructus (ELP) has been previously shown its bone protecting effects in ovariectomized osteoporotic rats and also in post‐menopausal osteopenic women. This study aimed to investigate the efficacy of ELP against bone loss during physical inactivity or weightlessness. A hindlimb unloading tail‐suspended rat model was used for studying the effects of ELP on bone mineral density (BMD) and bone micro‐architecture. For in vitro mechanistic studies, rat mesenchymal stem cells (MSCs) and mouse macrophage cells (RAW264.7) were used for studying the effects of ELP on osteogenic/adipogenic differentiations and osteoclastogenesis, respectively. Our data illustrated that ELP had a significant preventive effect against bone loss induced by tail‐suspension (TS) at day 28 (p < 0.01) as indicated in the reduction in BMD loss and the preservation of bone micro‐architecture. ELP could significantly promote the osteogenesis and suppress the adipogenesis (p < 0.05) in MSCs. Besides, significant inhibition of osteoclast formation (p < 0.01) was found in ELP‐treated RAW264.7 cells upon receptor activator of nuclear factor kappa‐B ligand induction. Our study presents the first scientific evidence that ELP had a significant preventive effect against bone loss induced by TS through the actions of enhancing osteogenesis, suppressing adipogenesis and osteoclastogenesis. Copyright © 2012 John Wiley & Sons, Ltd.  相似文献   
109.
An audit of atopic eczema management, conducted on behalf of the British Association of Dermatologists, examined service structure (phase 1), process (phase 2) and outcome (phase 3). In phase 2, an on-site case-note audit was conducted in 19 hospital dermatology departments randomly selected from the original sample of 187 centres across the U.K. In total, 630 sets of notes were examined for completeness of: (i) information given to general practitioners (GPs) in clinic letters and (ii) facts relevant to the management of atopic eczema recorded in the patients' notes. In general, the information given to GPs in the clinic letters was good, with the recording of diagnosis, treatment and follow-up approaching the 100% working standard. Factual information such as site and severity of eczema (83% and 74%), and presence or absence of asthma (53%) were better recorded than quality of life issues such as sleep loss secondary to itching (21%) and effect on school, work or social life (6%). On average, only 51% of all audit measures were recorded across all centres, with slight variation between centres (41-61%). The centre with the best recording had a purpose-designed data sheet for doctors to complete when seeing new patients with atopic eczema. Such data sheets may help improve case-note recording. Similar data sheets for patients to complete may be more time-efficient.  相似文献   
110.
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