全文获取类型
收费全文 | 4807篇 |
免费 | 358篇 |
国内免费 | 51篇 |
专业分类
耳鼻咽喉 | 20篇 |
儿科学 | 65篇 |
妇产科学 | 77篇 |
基础医学 | 421篇 |
口腔科学 | 146篇 |
临床医学 | 1137篇 |
内科学 | 324篇 |
皮肤病学 | 20篇 |
神经病学 | 223篇 |
特种医学 | 120篇 |
外科学 | 360篇 |
综合类 | 476篇 |
一般理论 | 3篇 |
预防医学 | 1386篇 |
眼科学 | 8篇 |
药学 | 195篇 |
15篇 | |
中国医学 | 113篇 |
肿瘤学 | 107篇 |
出版年
2024年 | 12篇 |
2023年 | 111篇 |
2022年 | 168篇 |
2021年 | 232篇 |
2020年 | 218篇 |
2019年 | 190篇 |
2018年 | 170篇 |
2017年 | 167篇 |
2016年 | 176篇 |
2015年 | 147篇 |
2014年 | 296篇 |
2013年 | 364篇 |
2012年 | 231篇 |
2011年 | 249篇 |
2010年 | 177篇 |
2009年 | 221篇 |
2008年 | 250篇 |
2007年 | 220篇 |
2006年 | 199篇 |
2005年 | 187篇 |
2004年 | 174篇 |
2003年 | 161篇 |
2002年 | 148篇 |
2001年 | 122篇 |
2000年 | 81篇 |
1999年 | 54篇 |
1998年 | 36篇 |
1997年 | 54篇 |
1996年 | 32篇 |
1995年 | 38篇 |
1994年 | 28篇 |
1993年 | 42篇 |
1992年 | 44篇 |
1991年 | 31篇 |
1990年 | 32篇 |
1989年 | 23篇 |
1988年 | 25篇 |
1987年 | 21篇 |
1986年 | 11篇 |
1985年 | 8篇 |
1984年 | 8篇 |
1983年 | 7篇 |
1982年 | 6篇 |
1981年 | 13篇 |
1980年 | 6篇 |
1979年 | 4篇 |
1978年 | 6篇 |
1977年 | 5篇 |
1976年 | 6篇 |
1975年 | 2篇 |
排序方式: 共有5216条查询结果,搜索用时 15 毫秒
71.
《Gait & posture》2017
Movement competence (MC) is defined as the development of sufficient skill to assure successful performance in different physical activities. Monitoring children MC during maturation is fundamental to detect early minor delays and define effective intervention. To this purpose, several MC assessment batteries are available. When evaluating movement strategies, with the aim of identifying specific skill components that may need improving, widespread MC assessment is limited by high time consumption for scoring and the need for trained operators to ensure reliability. This work aims to facilitate and support the assessment by designing, implementing and validating an instrumented version of the TGMD-2 locomotor subtest based on Inertial Measurement Units (IMUs) to quantify MC in children rapidly and objectively. 45 typically developing children, aged 6–10, performed the TGMD-2 locomotor subtest (six skills). During the tests, children wore five IMUs mounted on lower back, on ankles and on wrists. Sensor and video recordings of the tests were collected. Three expert evaluators performed the standard assessment of TGMD-2. Using theoretical and modelling approaches, algorithms were implemented to automatically score children tests based on IMUs’ data. The automatic assessment, compared to the standard one, showed an agreement higher than 87% on average on the entire group for each skill and a reduction of time for scoring from 15 to 2 min per participant. Results support the use of IMUs for MC assessment: this approach will allow improving the usability of MC assessment, supporting objectively evaluator decisions and reducing time requirement for the evaluation of large groups. 相似文献
72.
73.
74.
《ALTER. European Journal of Disability research, Journal europeen de recherche sur le handicap》2016,10(3):221-235
This article compares Turkey's Constitution and its Disabled Persons Act with the United Nations Convention on the Rights of Persons with Disabilities (UNCRPD) and the core concepts of United States (U.S.) disability policy. Conclusions are that Turkey's Constitution and statutes are remarkably congruent with the UNCRPD and the core concepts. They are not, however, identical. This fact suggests that Turkey can still improve its statutes to reflect more closely the UNCRPD and core concepts. The review of these policy documents suggests that there are other steps Turkey can take to improve disability policy and its implementation. They are to amend Turkey's laws, determine the status of individuals and families affected by disability, and pursue vigorous implementation of their rights. 相似文献
75.
76.
Liang-Chih Chang 《Aging & mental health》2014,18(6):754-758
Objectives: The objectives of this study were to examine whether a leisure education program could facilitate leisure competence among older adults and whether it could also reduce their stress.Methods: A pre-test–post-test randomized experimental design was conducted. Subjects were randomly assigned to either an experimental group (n = 30) or a control group (n = 30). A leisure education program was used to serve as the intervention. A day before this experiment was carried out, pre-test data were collected using leisure competence and stress scales. Thirty minutes after this experiment ended, post-test data were collected using the same scales. These data were analyzed using an analysis of covariance.Results: The results indicated that the average post-test scores of leisure competence in the experimental group were significantly higher than those in the control group and that the average post-test scores of stress in the experimental group were significantly lower than those in the control group.Conclusion: Healthcare practitioners should adopt the provision of leisure education as a priority to facilitate leisure competence and reduce stress among older adults. 相似文献
77.
Olöf Birna Kristjansdottir André Vågan Margrét Hrönn Svavarsdóttir Hilde Blindheim Børve Kari Hvinden Veerle Duprez Ann Van Hecke Lena Heyn Hilde Strømme Una Stenberg 《Patient education and counseling》2021,104(5):1030-1048
ObjectivesTo provide overview of research on training interventions for healthcare providers aimed at promoting competencies in delivering group-based patient education.MethodsA systematic literature search identified relevant studies. Data was extracted on training details, study design, outcomes and experiences. Results were summarized and qualitative data analyzed using content analysis.ResultsTwenty-seven studies exploring various training interventions were included. Ten studies used qualitative methods, eight quantitative and nine mixed methods. Use of a comparison group, validated instruments and follow-up measures was rare. Healthcare providers’ reactions to training were mostly positive. Several studies indicated positive short-term effects on self-efficacy and knowledge. Results on observed skills and patient outcomes were inconclusive. Results on healthcare providers’ experience of delivery of group-based patient education following training were categorized into 1) Benefits of training interventions, 2) Barriers to implementation and 3) Delivery support.ConclusionsFurther evaluation of training for healthcare providers delivering group-based patient education is needed before conclusions on training efficacy can be drawn. The results indicate an expanding research field still in maturation.Practice implicationsEfficacy studies evaluating theoretically grounded training with clear attention on group facilitation and follow-up support are needed. Inclusion of validated instruments and long-term outcomes is encouraged. 相似文献
78.
79.
《European journal of surgical oncology》2021,47(10):2483-2491
PurposeTo determine the impact of definitive presurgical diagnosis on surgical margins in breast-conserving surgery (BCS) for primary carcinomas; clinicopathological features were also analyzed.MethodsThis retrospective study included women who underwent BCS for primary carcinomas in 2016 and 2017. Definitive presurgical diagnosis was defined as having a presurgical core needle biopsy (CNB) and not being upstaged between biopsy and surgery. Biopsy data and imaging findings including breast density were retrieved. Inadequate surgical margins (IM) were defined per latest ASCO and ASTRO guidelines. Univariable and multivariable analyses were performed.Results360 women (median age, 66) met inclusion criteria with 1 having 2 cancers. 82.5% (298/361) were invasive cancers while 17.5% (63/361) were ductal carcinoma in situ (DCIS). Most biopsies were US-guided (284/346, 82.0%), followed by mammographic (60/346, 17.3%), and MRI-guided (2/346, 0.6%). US and mammographic CNB yielded median samples of 2 and 4, respectively, with a 14G needle. 15 patients (4.2%) lacked presurgical CNB. The IM rate was 30.0%. In multivariable analysis, large invasive cancers (>20 mm), dense breasts, and DCIS were associated with IM (p = 0.029, p = 0.010, and p = 0.013, respectively). Most importantly, lack of definitive presurgical diagnosis was a risk factor for IM (OR, 2.35; 95% CI: 1.23–4.51, p = 0.010). In contrast, neither patient age (<50) nor aggressive features (e.g., LVI) were associated with IM.ConclusionLack of a definitive presurgical diagnosis was associated with a two-fold increase of IM in BCS; other risk factors were dense breasts, large invasive cancers, and DCIS. 相似文献
80.