全文获取类型
收费全文 | 2488篇 |
免费 | 171篇 |
国内免费 | 19篇 |
专业分类
2678篇 |
出版年
2025年 | 3篇 |
2024年 | 33篇 |
2023年 | 52篇 |
2022年 | 53篇 |
2021年 | 58篇 |
2020年 | 111篇 |
2019年 | 125篇 |
2018年 | 114篇 |
2017年 | 106篇 |
2016年 | 125篇 |
2015年 | 72篇 |
2014年 | 144篇 |
2013年 | 426篇 |
2012年 | 83篇 |
2011年 | 96篇 |
2010年 | 87篇 |
2009年 | 129篇 |
2008年 | 125篇 |
2007年 | 122篇 |
2006年 | 91篇 |
2005年 | 94篇 |
2004年 | 60篇 |
2003年 | 44篇 |
2002年 | 28篇 |
2001年 | 27篇 |
2000年 | 30篇 |
1999年 | 20篇 |
1998年 | 17篇 |
1997年 | 7篇 |
1996年 | 11篇 |
1995年 | 11篇 |
1994年 | 16篇 |
1993年 | 8篇 |
1992年 | 4篇 |
1990年 | 7篇 |
1989年 | 3篇 |
1988年 | 2篇 |
1985年 | 15篇 |
1984年 | 11篇 |
1983年 | 10篇 |
1982年 | 7篇 |
1981年 | 17篇 |
1980年 | 9篇 |
1979年 | 9篇 |
1978年 | 9篇 |
1977年 | 14篇 |
1976年 | 3篇 |
1975年 | 10篇 |
1974年 | 7篇 |
1973年 | 10篇 |
排序方式: 共有2678条查询结果,搜索用时 15 毫秒
71.
在诺贝尔生理学或医学奖105年的历史中,美国分别占了颁奖年度的52.08%,获奖成果的44.87%,获奖人数的48.91%.形成这些科学家学术优势积累和美国国家科技竞争优势的学术条件背景是:适宜的宏观政策,充足的经费投入,成功的人才政策,根本的教育改革和创新的科技管理. 相似文献
72.
Eric A. Storch Tanya K. Murphy Rhea M. Chase Mary Keeley Wayne K. Goodman Maurice Murray Gary R. Geffken 《Journal of psychopathology and behavioral assessment》2007,29(4):211-219
The present study analyzed rates of peer victimization in children with a chronic tic disorder as compared to children with
type 1 diabetes and healthy controls. The associations among peer victimization, tic symptom severity, and psychological symptoms,
as well as the potential mediating relationship between peer victimization, tic severity, and child internalizing symptoms,
were also explored. Children with tics displayed higher rates of peer victimization than control groups, and peer victimization
in children with tics was positively correlated with tic symptom severity, loneliness, anxiety symptoms, and parent report
of child internalizing symptoms. Results also supported the hypothesis that peer victimization mediates the relationship between
tic symptom severity and loneliness. Findings highlight the importance of the assessment and treatment of psychosocial variables
in children with chronic tic disorders, including social functioning and peer relationships. 相似文献
73.
在心血管疾病临床试验中,替代指标常用于评价干预措施的疗效。但替代指标在心血管疾病临床试验中非常复杂,因此,心血管医生在解读和评价心血管疾病临床试验的结果时,应正确认识替代指标的内涵、应用背景及其局限性,同时,还应客观地评价相关替代指标的证据强度,以寻找最好的医学证据指导其临床决策和实践。 相似文献
74.
The present study investigated emotional influences on behavior in a one-shot, simultaneous, give-some dilemma game. In accordance with functional perspectives on the role of discrete emotions, we found fear to reduce, and guilt to increase levels of cooperation. Moreover, we showed individual differences in the effect of induced emotional states. Specifically, results indicated that inducing fear reduced cooperation only for individuals with a pro-social value orientation, and that guilt induction increased cooperation only for individuals with a pro-self value orientation. We also established that both social value orientations could be adequately described in terms of differences in chronically accessible goals (as assessed by value-importance ratings). These results, therefore, seem to support our hypothesis that individual differences in the behavioral consequences of induced emotional states are related to variation in chronic accessibility of general goals associated with a particular emotional state. 相似文献
75.
Robyn Lewis Claar James A. Blumenthal 《Current directions in psychological science》2003,12(4):133-137
Emotional stress has been associated with the development and progression of several chronic medical conditions. Recently, researchers have assessed the impact of stress-management interventions on patients' psychological functioning, quality of life, and various disease outcomes, including survival. This review summarizes the value of stress-management techniques in the treatment of two important, life-threatening conditions: coronary heart disease and cancer. Results from randomized clinical trials indicate that psychological interventions can improve patients' psychological functioning and quality of life. However, there is limited evidence to suggest that these interventions significantly reduce morbidity and mortality. 相似文献
76.
In arithmetic problems solving, the representation of the problem spontaneously induced by the content of the statement is not always compatible with the solving strategy. This study evaluates a learning approach designed to lead pupils to build an alternative representation to the one spontaneously induced. In this paper, we evaluate the efficiency of this learning approach with children with learning difficulties enrolled in a priority education network. This learning by semantic recoding is a process based on an analogy between the problems and a comparison of strategies. The results show that after learning, the pupils built alternative representations. 相似文献
77.
Darlene L. Witte‐Townsend Emily DiGiulio 《International Journal of Children's Spirituality》2004,9(2):127-142
Witte‐Townsend and DiGiulio explore some of the dimensions of knowing that children, teachers and parents may engage together during story‐time. They reflect on some of their own long‐term relationships with children and children's books, especially Phoebe Gilman's Something from nothing (published in 1992) and Simms Taback's Joseph had a little overcoat, published in 1999. The authors probe issues such as why children ask to hear a favourite story over and over and why they suddenly abandon all interest and move on to a new book. They explore the meaning of the silences that sometimes arise during story‐time, pooling around the young listeners as the last words of the book are read. Witte‐Townsend and DiGiulio remind us of the value of literature in the lives of children and they affirm that the reading and re‐reading of favourite stories enables the understanding of complex human issues and contributes significantly to social, emotional and spiritual growth. 相似文献
78.
本篇综述总结了帕金森病的诊断、鉴别诊断和病程监测的各领域的生物学标记物的研究进展。其中重点介绍了神经影像学和生物化学领域的生物学标记物,也是当前研究较为成熟的两大领域。神经影像学标记物以多巴胺能影像及非多巴胺能影像为代表,生物化学标记物为包括a一突触核蛋白在内的多种蛋白和激素,两者的结合能够有效提高疾病诊断的特异性和灵敏性。同时文章还介绍了当前研究的热点——帕金森病的前驱诊断手段,即在疾病典型的运动症状和非运动症状出现前便可预测帕金森病的诊断手段。 相似文献
79.
《金匮要略》中“肝病传脾”的思想,广泛应用于临床诊断与治疗,本文以脏腑经络辨证论治思想为依据,探讨中医诊断肝痛的思路:根据症状判断病位深浅,肝病见四肢疲乏为病轻、肝病见食不消化甚至不思饮食为病重。由此判断病情轻重,为临床提供治疗依据。 相似文献
80.
时比分析农村与城镇终末期肾病患者的临床状况,旨在了解新农合政策带给农村终末期肾病患者的益处及今后还需完善和努力之处.对广西壮族自治区人民医院血液净化治疗中心2007年新增的238例终末期肾病患者按农村与城镇进行分组对比分析.96例农村患者,88例选择血液透析,8例放弃治疗;142例城镇患者,23例选择腹膜透析,108例血液透析,11例放弃.无论是城镇还是农村患者慢性肾炎为主要的原发病、都存在透析过晚、并发症发生率高、急诊透析率高的现象.与城镇组相比,农村组患者平均年龄、肾痛知晓率、残余肾功能、血红蛋白、二氧化碳结合力、尿素清除指数低于城镇组(P<0.05);梗阻性肾病发病率、并发症发生率、急诊透析率、死亡率、失访率高于城镇组(P<0.05).新农合的实施使农村终末期肾病患者获得了治疗的机会,针对农村患者肾病知晓率低、临床状况差的特点,需加强农村慢性肾病的防治工作. 相似文献