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   24344篇
  免费   2631篇
  国内免费   367篇
耳鼻咽喉   239篇
儿科学   681篇
妇产科学   341篇
基础医学   1259篇
口腔科学   763篇
临床医学   5020篇
内科学   2975篇
皮肤病学   251篇
神经病学   2031篇
特种医学   514篇
外科学   2459篇
综合类   1712篇
一般理论   6篇
预防医学   5103篇
眼科学   143篇
药学   2460篇
  64篇
中国医学   437篇
肿瘤学   884篇
  2024年   25篇
  2023年   613篇
  2022年   805篇
  2021年   1272篇
  2020年   1366篇
  2019年   1399篇
  2018年   1341篇
  2017年   1249篇
  2016年   1185篇
  2015年   1009篇
  2014年   1865篇
  2013年   2544篇
  2012年   1284篇
  2011年   1449篇
  2010年   1062篇
  2009年   1065篇
  2008年   1077篇
  2007年   1028篇
  2006年   808篇
  2005年   763篇
  2004年   616篇
  2003年   521篇
  2002年   431篇
  2001年   416篇
  2000年   329篇
  1999年   253篇
  1998年   203篇
  1997年   173篇
  1996年   176篇
  1995年   150篇
  1994年   154篇
  1993年   109篇
  1992年   106篇
  1991年   82篇
  1990年   63篇
  1989年   54篇
  1988年   39篇
  1987年   44篇
  1986年   36篇
  1985年   43篇
  1984年   35篇
  1983年   17篇
  1982年   21篇
  1981年   17篇
  1980年   12篇
  1979年   10篇
  1978年   4篇
  1976年   2篇
  1975年   7篇
  1974年   4篇
排序方式: 共有10000条查询结果,搜索用时 174 毫秒
51.
Precision Medicine is becoming the new paradigm in healthcare as it enables better resources allocation, treatment optimization with a potential side-effects reduction and consequent impact on quality of life and survival. This revolution is being catalyzed by liquid biopsy technologies, which provide prognostic and predictive information for advanced cancer patients, without the analytical and procedural drawbacks of tissue-biopsy. In particular, circulating tumor DNA (ctDNA) is gaining momentum as a clinically feasible option capable to capture both spatial and temporal tumor heterogeneity.Several techniques are currently available for ctDNA extraction and analysis, each with its preferential case scenarios and preanalytical implications which must be taken into consideration to effectively support clinical decision-making and to better highlight its clinical utility.Aim of this review is to summarize both analytical developments and clinical evidences to offer a comprehensive update on the deployment of ctDNA in breast cancer’s (BC) characterization and treatment.  相似文献   
52.
53.
Background: As the prevalence of diabetes mellitus (DM) continues to increase rapidly, there has been a rising need not only to assess the clinical outcomes but also the impact of DM on the health-related quality of life (HRQoL) of affected individuals. Most previous studies have found that having complications is strongly associated with decreased HRQoL in DM patients. As such, it is crucial to measure individuals’ preferences for DM-related complications in order to assess the magnitude of complications’ effect on overall HRQoL. In addition, preference scores are an essential component of cost–utility analyses (CUAs), which studies can incorporate healthcare costs, HRQoL and clinical outcomes of DM into one analysis.

Objective: The aims of this study were to assess the preference scores of DM-related complications using both the standard gamble (SG), a choice-based method, and visual analogue scale (VAS), a scaling method. We also aimed to assess several possible factors that might be associated with the preference scores of the complications.

Methods: This is a cross-sectional interview-administered survey, and 213 patients with type 2?DM were interviewed. The respondents’ preference scores of eleven DM-related complications were obtained using VAS and SG techniques. Demographic information, clinical characteristics and risk attitudes were also collected to explore factors that may affect patients’ preference scores.

Results: Nearly one quarter of participants in Taiwan ranked at least one of the complications worse than death. The mean VAS scores ranged from 0.004 (amputation) to 0.47 (nocturnal hypoglycemia) while the mean adjusted SG scores ranged from 0.30 (blindness) to 0.66 (nocturnal hypoglycemia). There were significant differences in all of the complications’ preference scores depending on risk attitudes.

Conclusion: Both the VAS and SG methods were used to elicit the preference scores of DM-related complications, and the preference scores derived could be useful for future cost utility analyses.  相似文献   

54.

Background

The Lancet Commission on Global Surgery highlighted global surgical need but offered little insight into the specific surgical challenges of children in low-resource settings. Efforts to strengthen the quality of global pediatric surgical care have resulted in a proliferation of partnerships between low-and middle-income countries (LMICs) and high-income countries (HICs). Standardized tools able to reliably measure gaps in delivery and quality of care are important aids for these partnerships. We undertook a systematic review (SR) of capacity assessment tools (CATs) focused on needs assessment in pediatric surgery.

Methods

A comprehensive search strategy of multiple electronic databases was conducted per PRISMA guidelines without linguistic or temporal restrictions. CATs were selected according to pre-defined inclusion criteria. Articles were assessed by two independent reviewers. Methodological quality of studies was appraised using the COSMIN checklist with 4-point scale.

Results

The search strategy generated 16,641 original publications, of which three CATs were deemed eligible. Eligible tools were either excessively detailed or oversimplified. None used weighted scores to identify finer granularity between institutions. No CATs comprehensively included measures of resources, outcomes, accessibility/impact and training.

Discussion

The results of this study identify the need for a CAT capable of objectively measuring key aspects of surgical capacity and performance in a weighted tool designed for pediatric surgical centers in LMICs.

Type of Study

Systematic Review.

Level of Evidence

II.  相似文献   
55.
Objective: This was a retrospective study designed to examine the relationship between inpatient neuropsychological status and future utilization costs. Methods: We completed a retrospective chart review of 280 patients admitted to a large academic medical center who were referred for bedside neuropsychological evaluation. Patients were grouped based on neuropsychological recommendation regarding level of supportive needs post-discharge (low, moderate, high). Level of support was used as a gross surrogate indicator of cognitive status in this heterogeneous sample. We also included patients who refused assessment. Outcome variables included time to readmission, number of emergency department visits, inpatient admissions, length of hospitalization, and total costs of hospitalizations, 30 days and 1 year following discharge. Results: Multivariate analysis indicated patients who refused assessment had higher inpatient service utilization (number of ED visits, number of admissions, and total cost of hospitalization) compared to those with moderate needs. Also, high needs patients had higher total cost of hospitalization at 1 year, and those with low needs used the ED more, compared to those with moderate needs. Conclusions: Our findings replicate prior studies linking refusal of neuropsychological evaluation to higher service utilization costs, and suggest a nonlinear relationship between cognitive impairment severity and future costs for medical inpatients (different groups incur different types of costs). Results preliminarily highlight the potential utility of inpatient neuropsychological assessment in identifying patients at risk for greater hospital utilization, which may allow for the development of appropriate interventions for these patients.  相似文献   
56.
Objectives: Atopic dermatitis (AD) is a chronic, relapsing skin condition, with signs and symptoms that impact patients’ lives and are best measured from the patient perspective. Therefore, there is a need for AD-specific questionnaires that are consistent with Food and Drug Administration guidance and best measurement practices, assessing sign and symptom severity and associated impacts, to support treatment efficacy in regulated trials. The objectives were to develop patient-reported outcome (PRO) questionnaires assessing sign and symptom severity, as well as impacts of moderate-to-severe adult AD.

Methods: A targeted literature review and meetings with clinical experts (dermatologists) were conducted to identify AD-related sign, symptom, and impact concepts. Results were harmonized and used to construct two draft PRO questionnaires: the Atopic Dermatitis Symptom Scale (ADerm-SS; 11 items) and the Atopic Dermatitis Impact Scale (ADerm-IS; 10 items). The content validity and questionnaire content were evaluated via qualitative concept elicitation/cognitive debriefing interviews with adult patients with moderate-to-severe AD.

Results: From the literature (n?=?13 articles), 13 sign and symptom and 43 impact concepts were identified, while 21 sign and symptom and 48 impacts were elicited from experts (n?=?3). During the patient interviews (n?=?15), 19 sign and symptom and 41 impact concepts were reported, the majority of which were evaluated by the ADerm-SS and ADerm-IS, thus substantiating the content of both questionnaires. Additionally, patients interpreted both questionnaires as intended by the developers.

Conclusions: The ADerm-SS and ADerm-IS can be regarded as content-valid PRO questionnaires for moderate-to-severe AD.  相似文献   

57.
58.
59.
《中医基础理论》是中医学课程体系中的主干课程,其教学质量对于中医学人才的总体培养质量具有举足轻重的作用。构建科学合理的教学评价方式是切实推进教学改革,提升教学质量的重要一环。文章论述了《中医基础理论》课程多元化教学评价方式的构建和具体实施方案,在整个《中基》教学过程的不同阶段合理地运用三种评价方式,进行全面客观和准确的判断评价,从而为师生"教"与"学"的切实改进和提升提供真实的依据。实践表明:多元化教学评价方式增强了学生学习的兴趣,提高了学生自主学习的积极性和能力,提高了学生运用知识分析和解决问题的能力,培育了学生的团队协作精神和创新思维;同时,激发了教师教学的热情,促进了教师教学理念、教学方法、教学手段以及专业知识的更新,提高了教师综合素质。本文对实践中存在的问题也进行了总结。  相似文献   
60.
As global life expectancy has increased in most countries, there is a rising percentage of patients over 65 years old being diagnosed with colorectal cancer. Despite an increase in the incidence and prevalence of colorectal cancer in older adults, this cohort receives adjuvant therapy at a decreased rate due to anticipated intolerance. The presumed limitations seem to be based on chronologic age, competing life limiting diagnoses, and the paucity of data studying this population in major clinical trials. This review explores the data regarding disparities in the treatment of older patients with colorectal cancer, safety and efficacy of adjuvant therapy, and newer tools to make decisions based on the biologic age, rather than chronologic age, of the patient.  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