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   8192篇
  免费   659篇
  国内免费   16篇
耳鼻咽喉   22篇
儿科学   283篇
妇产科学   244篇
基础医学   1129篇
口腔科学   91篇
临床医学   1339篇
内科学   1335篇
皮肤病学   136篇
神经病学   747篇
特种医学   195篇
外科学   758篇
综合类   124篇
一般理论   22篇
预防医学   1095篇
眼科学   245篇
药学   605篇
中国医学   11篇
肿瘤学   486篇
  2023年   92篇
  2022年   43篇
  2021年   216篇
  2020年   178篇
  2019年   273篇
  2018年   301篇
  2017年   234篇
  2016年   244篇
  2015年   259篇
  2014年   359篇
  2013年   487篇
  2012年   677篇
  2011年   669篇
  2010年   361篇
  2009年   317篇
  2008年   512篇
  2007年   559篇
  2006年   516篇
  2005年   526篇
  2004年   476篇
  2003年   458篇
  2002年   358篇
  2001年   69篇
  2000年   49篇
  1999年   64篇
  1998年   77篇
  1997年   63篇
  1996年   41篇
  1995年   45篇
  1994年   46篇
  1993年   48篇
  1992年   20篇
  1991年   23篇
  1990年   16篇
  1989年   13篇
  1988年   18篇
  1987年   16篇
  1986年   16篇
  1985年   15篇
  1984年   16篇
  1982年   11篇
  1981年   8篇
  1980年   7篇
  1978年   9篇
  1977年   5篇
  1975年   5篇
  1974年   6篇
  1973年   10篇
  1971年   5篇
  1970年   7篇
排序方式: 共有8867条查询结果,搜索用时 31 毫秒
1.
Patient navigation is a strategy for overcoming barriers to reduce disparities and to improve access and outcomes. The aim of this umbrella review was to identify, critically appraise, synthesize, and present the best available evidence to inform policy and planning regarding patient navigation across the cancer continuum. Systematic reviews examining navigation in cancer care were identified in the Cochrane Central Register of Controlled Trials (CENTRAL), PubMed, Embase, Cumulative Index of Nursing and Allied Health (CINAHL), Epistemonikos, and Prospective Register of Systematic Reviews (PROSPERO) databases and in the gray literature from January 1, 2012, to April 19, 2022. Data were screened, extracted, and appraised independently by two authors. The JBI Critical Appraisal Checklist for Systematic Review and Research Syntheses was used for quality appraisal. Emerging literature up to May 25, 2022, was also explored to capture primary research published beyond the coverage of included systematic reviews. Of the 2062 unique records identified, 61 systematic reviews were included. Fifty-four reviews were quantitative or mixed-methods reviews, reporting on the effectiveness of cancer patient navigation, including 12 reviews reporting costs or cost-effectiveness outcomes. Seven qualitative reviews explored navigation needs, barriers, and experiences. In addition, 53 primary studies published since 2021 were included. Patient navigation is effective in improving participation in cancer screening and reducing the time from screening to diagnosis and from diagnosis to treatment initiation. Emerging evidence suggests that patient navigation improves quality of life and patient satisfaction with care in the survivorship phase and reduces hospital readmission in the active treatment and survivorship care phases. Palliative care data were extremely limited. Economic evaluations from the United States suggest the potential cost-effectiveness of navigation in screening programs.  相似文献   
2.
Now is an exciting era of development in immunotherapy checkpoint inhibitors and their effect on the treatment of NPC. While the general prognosis of R/M disease is poor, immunotherapy offers some promise in a malignancy associated with EBV and characterized by a peritumoural immune infiltrate. Our study aims to review past and on-going clinical trials of monoclonal antibody therapies against the checkpoint inhibitors (e.g. PD1 and CTLA-4), in R/M NPC. All randomized and nonrandomized controlled trials involving immune checkpoint inhibitor interventions for treatment of NPC were included in the study. We utilized a validated “risk of bias” tool to assess study quality. Four separate Phase I–II trials report the potential of PD1 inhibitor treatment for patients with NPC. Within the observed groups, camrelizumab combined with chemotherapy achieved an objective response in 91% of patients as first-line treatment for metastatic NPC (PFS 68% at 1-year) but this was associated with a high rate of grade >3 adverse events (87%; CTCAE version 4.03). The remaining three studies focused on recurrent NPC disease in patients who had received at least one line of prior chemotherapy. Within this group, camrelizumab monotherapy achieved an objective response in 34% of patients (PFS 27% at 1-year; range across all three studies 20.5–34%). No NPC trial has yet reported on specific outcomes for non-PD1 checkpoint inhibitors but 11 on-going studies include alternative targets (e.g. PD-L1/CTLA-4) as combination or monotherapy treatments. In considering checkpoint immunotherapies for NPC, initial results show promise for anti-PD1 interventions. Further phase I–III trials are in progress to clarify clinical outcomes, fully determine safety profiles, and optimize drug combinations and administration schedules.  相似文献   
3.
The UK has low breastfeeding rates, with socioeconomic disparities. The Assets‐based feeding help Before and After birth (ABA) intervention was designed to be inclusive and improve infant feeding behaviours. ABA is underpinned by the behaviour change wheel and offers an assets‐based approach focusing on positive capabilities of individuals and communities, including use of a Genogram. This study aimed to investigate feasibility of intervention delivery within a randomised controlled trial (RCT). Nulliparous women ≥16 years, (n = 103) from two English sites were recruited and randomised to either intervention or usual care. The intervention – delivered through face‐to‐face, telephone and text message by trained Infant Feeding Helpers (IFHs) – ran from 30‐weeks' gestation until 5‐months postnatal. Outcomes included recruitment rates and follow‐up at 3‐days, 8‐weeks and 6‐months postnatal, with collection of future full trial outcomes via questionnaires. A mixed‐methods process evaluation included qualitative interviews with 30 women, 13 IFHs and 17 maternity providers; IFH contact logs; and fidelity checking of antenatal contact recordings. This study successfully recruited women, including teenagers, from socioeconomically disadvantaged areas; postnatal follow‐up rates were 68.0%, 85.4% and 80.6% at 3‐days, 8‐weeks and 6‐months respectively. Breastfeeding at 8‐weeks was obtained for 95.1% using routine data for non‐responders. It was possible to recruit and train peer supporters to deliver the intervention with adequate fidelity. The ABA intervention was acceptable to women, IFHs and maternity services. There was minimal contamination and no evidence of intervention‐related harm. In conclusion, the intervention is feasible to deliver within an RCT, and a definitive trial required.  相似文献   
4.
5.
6.
7.
8.
9.
10.
BACKGROUND: According to the Center for Disease Control and Prevention (CDC), an estimated 30 million people ride horses each year in the United States. Horseback riding related injuries are common, with an estimated 50,000 emergency room visits annually. The popularity of recreational horseback riding has increased in South Florida and the incidence of associated traumatic injuries is a reflection of this. MATERIAL AND METHODS: Retrospective review of patients admitted to a state designated Level I trauma center that sustained horseback riding associated injuries between January 2000 and December 2003. Information extracted from the Trauma Center's data base included demographics, mechanism of injury and toxicology screening. RESULTS: During the review period, twenty-seven patients were identified. There were 12 men and 15 women. The average age was 36 years. The injuries occurred during pleasure riding in 23 patients and thoroughbred related activities in 4 patients. Multiple severe injuries were common and documented in 24 patients. All patients required hospitalization with an average stay of 5 days. Five patients had a positive toxicology screen on admission. No deaths were documented in this review. CONCLUSION: Horseback riding related injuries tends to be serious. Alcohol and recreational drugs may contribute to exacerbate the extent of these injuries. The use of proper protective equipment, instructions for safe riding, and discouraging drug and alcohol use during riding activities should be emphasized.  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