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   231450篇
  免费   11336篇
  国内免费   928篇
耳鼻咽喉   2973篇
儿科学   7339篇
妇产科学   5117篇
基础医学   32117篇
口腔科学   8013篇
临床医学   17247篇
内科学   55079篇
皮肤病学   6592篇
神经病学   20478篇
特种医学   5401篇
外国民族医学   4篇
外科学   25290篇
综合类   1043篇
一般理论   81篇
预防医学   22353篇
眼科学   4530篇
药学   15929篇
中国医学   1020篇
肿瘤学   13108篇
  2024年   473篇
  2023年   1773篇
  2022年   2761篇
  2021年   6160篇
  2020年   3590篇
  2019年   5937篇
  2018年   8322篇
  2017年   5441篇
  2016年   5654篇
  2015年   6253篇
  2014年   7729篇
  2013年   10820篇
  2012年   17566篇
  2011年   18531篇
  2010年   9720篇
  2009年   7601篇
  2008年   14849篇
  2007年   15396篇
  2006年   14233篇
  2005年   13731篇
  2004年   12311篇
  2003年   11292篇
  2002年   10410篇
  2001年   4453篇
  2000年   4944篇
  1999年   3977篇
  1998年   1317篇
  1997年   965篇
  1996年   875篇
  1995年   708篇
  1994年   624篇
  1993年   539篇
  1992年   1598篇
  1991年   1286篇
  1990年   1158篇
  1989年   977篇
  1988年   831篇
  1987年   799篇
  1986年   802篇
  1985年   661篇
  1984年   536篇
  1983年   447篇
  1979年   419篇
  1975年   330篇
  1974年   376篇
  1973年   389篇
  1972年   317篇
  1971年   337篇
  1970年   319篇
  1969年   327篇
排序方式: 共有10000条查询结果,搜索用时 12 毫秒
11.

Objective

To assess a 6-month nutritional and physical activity intervention program on the nutritional status of overweight or obese and not very active 8-14 years old children by means of a controlled pre-post design (ACTIVA’T program).

Method

Pre-post study in 8-14 years old overweight or obese and low active children from Vilafranca del Penedès (Barcelona, Spain) randomized in control group (n = 51, 47.1% girls, nutritional intervention and ≤3 h/wk physical activity) and ACTIVA’T group (n = 45, 37.8% girls, nutritional and physical activity ≥5 h/wk intervention). Body mass index, waist/height index, and diet quality by means of KIDMED test at the beginning and at the end of the program were assessed. During the intervention, each participant was accompanied by a relative (father or mother) who performed the same activities as the children.

Results

Dietary recommendations have positively changed the habits of both ACTIVA’T and control group. The reversion in the prevalence of overweight and obesity was 93.8% and 58.6%, respectively, in the ACTIVA’T group, compared to 25.0% and 35.8% in the control group. Abdominal obesity was decreased from 42.2% to 17.8% in the ACTIVA’T group and from 47.1% to 27.5% in the control group.

Conclusions

The program ACTIVA’T (nutritional education and physical activity promotion) improves the quality of diet and reverses the prevalence of overweight and obesity in the underactive child population.  相似文献   
12.

Introduction

When evaluating a quality-of-life questionnaire (QLQ), many validation studies do not correlate quality-of-life scores with objective measurements of complications associated with treatment.

Patients and Methods

We performed a cross-sectional observational study with 300 patients submitted to breast-conserving therapy. The patients answered the European Organization for Research and Treatment of Cancer (EORTC) QLQs C-30 and BR23, as well as the Brazilian Portuguese version of the Breast Cancer Treatment Outcome Scale (BCTOS) questionnaire. Retest, internal consistency, factorial analysis, convergent/divergent analysis, and Rasch evaluation were performed. All patients underwent physical evaluations to assess lymphedema, handgrip strength, shoulder range of motion, breast cosmesis, and breast pain, and these groups were compared on the basis of BCTOS scores. Receiver operating characteristic curve determined the predictive value of BCTOS scores associated with clinical practice.

Results

The internal consistencies of the BCTOS domains ranged from 0.785 to 0.895. Factor analysis grouped according to the original questionnaire. Convergent validation showed differences in the sexual functioning and sexual enjoyment domains of the EORTC BR23. Analysis of known groups found that in most domains, the scores were higher in patients with lymphedema, strength deficit, shoulder range-of-motion alteration, poor breast cosmesis, breast pain, and axillary lymphadenectomy. Using a cutoff of 1.26, lymphedema was associated with the edema domain; using a cutoff of 1.33, Late Effects Normal Tissue Task Force/Subjective, Objective, Management, Analytic pain was associated with the pain domain; and using a cutoff of 2.37, the cosmetic domain was associated with subjective cosmesis.

Conclusion

The association of objective measurements in a validation study of quality of life qualified the study and allowed us to develop better parameters for comparisons of results of breast-conserving therapy between populations.  相似文献   
13.
14.
Abstract

The study examines Parental Feeding Practices (PFP) in relation to adherence to the Mediterranean Diet (MD) and children’s weight status. It’s a cross-sectional study of 402 parents (68.4% mothers), with children aged 2–12 years. Parents completed the Comprehensive Parental Feeding Questionnaire and the Mediterranean Diet Quality Index for children and adolescents (KIDMED), evaluating children’s adherence to the MD. Logistic regression showed that in children aged 2–<6 years, “emotion regulation/food as reward” and “pressure” decrease MD adherence (OR?=?0.186, p?<?0.0001 and OR?=?0.496, p?=?0.004), and “monitoring” decrease excess body weight (OR?=?0.284, p?=?0.009). In older children (6–12 years), “healthy eating guidance” and “monitoring” increase MD adherence (OR?=?3.262, p?=?0.001 and OR?=?3.147, p?<?0.0001), “child control” decreases MD adherence (OR?=?0.587, p?=?0.049), “pressure” decrease excess body weight (OR?=?0.495, p?<?0.0001) and “restriction” increase excess body weight (OR?=?1.784, p?=?0.015). “Healthy eating guidance” and “monitoring” seem to be the best PFP employed, in terms of children’s MD adherence and weight status.  相似文献   
15.
16.
Abstract

Background: Substance use disorder (SUD) treatment centers serve a population of clients who have diverse needs, and may desire or require access to varied treatments while seeking care for their SUDs. While pharmacotherapies have increased in popularity for the treatment of SUDs, adoption rates do remain quite low. But a wider array of pharmacotherapies has become available in recent years which may shift the trend. This article helps shed light on how variations in SUD treatment centers develop and persist with regard to the adoption and delivery of off-label medications. Methods: We use a nationally representative and longitudinal sample of SUD treatment centers in the US (N?=?196). We use a logistic regression to analyze the relationship between organizational characteristics and offering any medications, off-label. We also use a negative binomial regression to analyze the relationship between organizational characteristics and the number of medications that were used off-label. Results: Our findings reveal that older centers, accredited centers, and centers that offer mental health screenings are all positively associated with the provision of off-label medication in SUD treatment. We also find a positive relationship between private funding and offering a greater number of off-label medications. Conclusions: Our results suggest that SUD clients who seek treatment from centers that offer medications off-label, may have access to a greater number of medication-assisted treatment options.  相似文献   
17.
ABSTRACT

Purpose

To describe the ultrabiomicroscopy (UBM) characteristics in patients with uveitic, convalescent, and recurrent Vogt-Koyanagi-Harada (VKH) disease.  相似文献   
18.
Abstract

The Finnish Diabetes Risk Score (FINDRISC) has been implemented to assess diabetes risk. The authors aimed in this study to determine the prediction capacity of FINDRISC for the early detection of cardiovascular diseases in women. A prevalence study was carried out on 441 women of Pueblo Libre (Peru). Anthropometric variables, blood pressure, blood glucose and comorbidity were measured and entered in FINDRISC. 4.8% of the studied women suffered from DM2, 14.3% from AHT, 33% obesity and 8.6% comorbidity. We found that FINDRISC was the best method to discriminate DM, AHT and comorbidity. FINDRISC is an effective non-invasive tool for women from low-and-middle-income countries.  相似文献   
19.
Abstract

In light of a growing body of evidence demonstrating pervasive health disparities, medical schools are increasingly incorporating educational programs on social medicine in undergraduate and graduate medical curricula. In 2015, we significantly restructured the cultural competency instruction for medical students at our institution, focusing on achieving greater health equity through caring for vulnerable populations and acknowledging and addressing bias and stereotyping. In order to facilitate educational sustainability while students were immersed in clinical care, a key element of our approach included extending teaching into the clerkship year. The resulting longitudinal thread, Health Equity and Social Justice, empowers future physicians with the knowledge and skills to work towards greater health equity. This article discusses the lessons learned in the implementation of this novel educational program. Our approach can serve as a model for other institutions considering similar instructional reform.  相似文献   
20.
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