收费全文 | 75018篇 |
免费 | 5545篇 |
国内免费 | 162篇 |
耳鼻咽喉 | 593篇 |
儿科学 | 2801篇 |
妇产科学 | 2475篇 |
基础医学 | 9146篇 |
口腔科学 | 1007篇 |
临床医学 | 13191篇 |
内科学 | 13417篇 |
皮肤病学 | 1112篇 |
神经病学 | 6912篇 |
特种医学 | 1352篇 |
外国民族医学 | 33篇 |
外科学 | 6392篇 |
综合类 | 968篇 |
一般理论 | 129篇 |
预防医学 | 10558篇 |
眼科学 | 855篇 |
药学 | 4206篇 |
1篇 | |
中国医学 | 103篇 |
肿瘤学 | 5474篇 |
2023年 | 446篇 |
2022年 | 632篇 |
2021年 | 1429篇 |
2020年 | 1043篇 |
2019年 | 1716篇 |
2018年 | 1917篇 |
2017年 | 1340篇 |
2016年 | 1567篇 |
2015年 | 1695篇 |
2014年 | 2260篇 |
2013年 | 3664篇 |
2012年 | 5184篇 |
2011年 | 5456篇 |
2010年 | 2942篇 |
2009年 | 2721篇 |
2008年 | 4893篇 |
2007年 | 5450篇 |
2006年 | 5284篇 |
2005年 | 5096篇 |
2004年 | 4917篇 |
2003年 | 4666篇 |
2002年 | 4400篇 |
2001年 | 597篇 |
2000年 | 446篇 |
1999年 | 600篇 |
1998年 | 992篇 |
1997年 | 757篇 |
1996年 | 682篇 |
1995年 | 593篇 |
1994年 | 566篇 |
1993年 | 560篇 |
1992年 | 382篇 |
1991年 | 326篇 |
1990年 | 310篇 |
1989年 | 277篇 |
1988年 | 267篇 |
1987年 | 257篇 |
1986年 | 243篇 |
1985年 | 285篇 |
1984年 | 295篇 |
1983年 | 303篇 |
1982年 | 381篇 |
1981年 | 361篇 |
1980年 | 304篇 |
1979年 | 174篇 |
1978年 | 163篇 |
1977年 | 175篇 |
1976年 | 160篇 |
1975年 | 135篇 |
1974年 | 123篇 |
Method: Thirty-two pediatric patients with stroke (Mage = 9.5 ± 2.7 years) and 32 demographically equivalent, healthy controls were tested on standardized measures of arithmetic, spelling, and intelligence. Executive functioning data were collected via standardized parent questionnaire.
Results: Relative to controls, stroke participants demonstrated significantly poorer functioning in math, spelling, metacognition, and behavioral-regulation. Pencil and paper arithmetic was particularly challenging for the stroke group, with 40% of patients reaching levels of clinical impairment. Hierarchical regression in stroke participants further revealed that metacognition was a robust predictor of academic deficits. Stroke occurring in later childhood and affecting cortical and subcortical brain regions also presented as potential clinical risk factors.
Conclusions: Children with stroke were especially vulnerable to math achievement deficits. Metacognition made a substantial contribution to academic achievement abilities among stroke patients, and results underscore the importance of early metacognitive skills in the completion of schoolwork. Results also emphasize that pediatric stroke patients are a heterogeneous group with regard to functioning and that there is value in examining standard score distributions of clinical participant samples. 相似文献
A key goal for implementation science is the identification of evidence-based consultation protocols and the active ingredients within these protocols that drive clinician behavior change. The current study examined clinicians’ self-coding of fidelity as a potential active ingredient of consultation for the Attachment and Biobehavioral Catch-up (ABC) intervention. It also examined two other potential predictors of clinician fidelity in response to consultation: dosage of consultation and working alliance. Twenty-nine clinicians (97% female, 62% White, M age?=?34 years) participated in a year of weekly fidelity-focused ABC consultation sessions, for which clinicians self-coded fidelity and received consultant feedback on both their coding and their fidelity. Data from the ABC fidelity measure were available for 1067 sessions coded by consultants, and clinicians’ self-coding accuracy was calculated from 1044 sessions coded by both clinicians and consultants. Alliance was measured with the Working Alliance Inventory—Trainee and Supervisor Versions. The study was observational, and fidelity and self-coding accuracy were modeled across time using hierarchical linear modeling. Clinicians’ ABC fidelity, as well as their self-coding accuracy, increased over the course of consultation. Clinicians’ self-coding accuracy predicted their initial fidelity and growth in fidelity. Working alliance was also linked to fidelity and self-coding accuracy. These results suggest that clinician self-coding should be further examined as an active ingredient of consultation. The study has important implications for the design of consultation procedures and fidelity assessments.
相似文献