全文获取类型
收费全文 | 18957篇 |
免费 | 1802篇 |
国内免费 | 251篇 |
专业分类
耳鼻咽喉 | 50篇 |
儿科学 | 572篇 |
妇产科学 | 438篇 |
基础医学 | 1762篇 |
口腔科学 | 165篇 |
临床医学 | 4297篇 |
内科学 | 1941篇 |
皮肤病学 | 60篇 |
神经病学 | 1204篇 |
特种医学 | 291篇 |
外科学 | 1871篇 |
综合类 | 1950篇 |
一般理论 | 2篇 |
预防医学 | 4432篇 |
眼科学 | 29篇 |
药学 | 878篇 |
13篇 | |
中国医学 | 226篇 |
肿瘤学 | 829篇 |
出版年
2024年 | 70篇 |
2023年 | 465篇 |
2022年 | 732篇 |
2021年 | 1037篇 |
2020年 | 1038篇 |
2019年 | 1005篇 |
2018年 | 944篇 |
2017年 | 951篇 |
2016年 | 893篇 |
2015年 | 844篇 |
2014年 | 1405篇 |
2013年 | 1690篇 |
2012年 | 1189篇 |
2011年 | 1183篇 |
2010年 | 963篇 |
2009年 | 873篇 |
2008年 | 918篇 |
2007年 | 857篇 |
2006年 | 678篇 |
2005年 | 536篇 |
2004年 | 438篇 |
2003年 | 357篇 |
2002年 | 299篇 |
2001年 | 230篇 |
2000年 | 216篇 |
1999年 | 186篇 |
1998年 | 137篇 |
1997年 | 148篇 |
1996年 | 89篇 |
1995年 | 99篇 |
1994年 | 95篇 |
1993年 | 74篇 |
1992年 | 59篇 |
1991年 | 43篇 |
1990年 | 35篇 |
1989年 | 35篇 |
1988年 | 30篇 |
1987年 | 32篇 |
1986年 | 19篇 |
1985年 | 23篇 |
1984年 | 24篇 |
1983年 | 19篇 |
1982年 | 13篇 |
1981年 | 5篇 |
1980年 | 7篇 |
1979年 | 8篇 |
1978年 | 6篇 |
1976年 | 4篇 |
1975年 | 3篇 |
1973年 | 2篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
目的 探讨营养支持在重症心脏瓣膜病外科治疗中的作用。方法2000年5月-2005年5月对182例重症心脏瓣膜病行瓣膜置换术,围术期采用营养支持疗法。其中单瓣病变74例,二尖瓣合并主动脉瓣病变108例。135例行三尖瓣成形术,37例行左房折叠术。结果 182例住院死亡5例,死亡率2.7%,术后并发低心排15例,死亡1例,随访151例,结论 科学的应用营养支持方案,可以明显地提高重症心脏瓣膜病外科手术成功率。 相似文献
33.
Abstract: The current study examined the extent to which mothers, fathers, teachers, and teenage friends influenced Latino adolescents’ academic motivation. Using path analysis, separate models were tested for 154 Latino boys and 156 Latina girls. Findings indicated that mothers’ and teachers’ academic support were positively related to adolescent girls’ academic motivation, and fathers’ and teachers’ academic support were positively related to adolescent boys’ academic motivation. The salience of teachers’ support, possible reasons for gender differences, and implications for future research are discussed. 相似文献
34.
管理人员职业紧张常模及转换表研制 总被引:1,自引:1,他引:0
目的中高层管理人员、一般管理人员职业紧张常模、应用表、分级标准研究。方法采用职业紧张量表(OSI-R),对中高层管理人员263例、一般管理人员569例,共计832例常模样本进行研究。结果首先,采用OSI-R量表分别研制了中高层管理人员、一般管理人员职业紧张常模;其次,在常模的基础上,分别研制了常模样本粗分转换为T分表。职业紧张程度分级职业任务和紧张反应问卷中,T分≥70分者,为高度职业紧张、紧张反应;T分在60分至69分范围内者,为中度职业紧张、紧张反应;T分在40分至59分范围内者,为适度职业紧张和紧张反应;处于正常范围。T分低于40分者,为相对缺乏职业紧张和紧张反应。在应对资源问卷中,T分低于30分者,表明高度缺乏应对资源;T分在30分至39分范围内者,表明中度缺乏应对资源;T分在40分至59分范围之间者,具有适度的应对资源,属于正常范围;T分≥60分者,表明有很强的应对资源。结论将职业紧张的模式结合中高层管理人员、一般管理人员职业紧张常模及应用表,分别针对不同个体主要紧张源、紧张反应、应对资源,采取有针对性的干预(组织、个体)措施,以降低中高层管理人员、一般管理人员职业紧张程度,保护和促进工作能力是职业卫生领域面临的重要任务之一。 相似文献
35.
36.
Clinical decisions are often made with incomplete information, yet patient care decisions are made every day. Patients vary clinically, uncertainty exists in diagnostic and prognostic information, and many preventive and treatment alternatives have not been formally assessed for their effectiveness. Because scientific information will never answer all clinical questions, clinical decisions are partially based on probabilistic information.
This paper describes how to apply clinical decision making to diagnosing and managing dental caries and periodontal diseases. By using explicit information to quantify probabilities and outcomes, clinical decision making analyzes decisions made under uncertain conditions and the uncertain impact of clinical information.
Clinical decision making incorporates concepts for preventing, diagnosing and treating dental caries and periodontal diseases: risk assessment, evidence-based dentistry, and multiple oral health outcomes. This information can serve as a tool for clinicians to augment clinical judgment and expertise. 相似文献
This paper describes how to apply clinical decision making to diagnosing and managing dental caries and periodontal diseases. By using explicit information to quantify probabilities and outcomes, clinical decision making analyzes decisions made under uncertain conditions and the uncertain impact of clinical information.
Clinical decision making incorporates concepts for preventing, diagnosing and treating dental caries and periodontal diseases: risk assessment, evidence-based dentistry, and multiple oral health outcomes. This information can serve as a tool for clinicians to augment clinical judgment and expertise. 相似文献
37.
王世嫘 《国际中华应用心理学杂志》2006,3(4):342-345
目的了解企业员工的工作倦怠状况,探讨社会支持对企业员工工作倦怠的影响并提出组织管理建议。方法以社会支持问卷和MBI-GS问卷对588名企业员工进行调查。结果企业员工的工作倦怠程度并不高,但仍存在.且以情绪耗竭的程度教高;社会支持与工作倦怠及共各构面部分呈显着负相关,社会支持对工作倦怠及其各构面具有显着的预测力,结论社会支持对企业员工工作倦怠有一定的影响.应引起管理者的重视。 相似文献
38.
ANDREW BOTTOMLEY 《European journal of cancer care》1997,6(1):11-17
Cancer causes significatlt emotional distress to a considerable majority of patients. Many of these patients typically receive little formal psychological intervention. Support groups, however, have provided one forum from which patients can attempt to gain help and can use to overcome some psychological trauma that accompanies the cancer hagnosis, subsequent treatment and relapse. This article reviews past studies of professionally run cancer support groups as opposed to psychological intervention groups. These studies are considered in light of the proposed benefits and the methodological limitations frequently inherent in such studies. 相似文献
39.
40.
ngela P. de Mattos Tereza C.M. Ribeiro Patrícia S.A. Mendes Sandra S. Valois Carlos M.C. Mendes Hugo C. Ribeiro Jr 《Nutrition Research》2009,29(7):462-469
Although previous studies have shown successful treatment of persistent diarrhea (PD) with the use of yogurt-based diets, some recent ones speculate the need of special formulas for the nutritional management of PD complicated cases. In the present study, we tested the hypothesis that the consumption of 3 lactose-free diets, with different degrees of complexity, is associated with lower stool output and shorter duration of diarrhea when compared with the use of a yogurt-based one on the nutritional management of PD. A total of 154 male infants, aged between 1 and 30 months, with PD and with or without dehydration, were randomly assigned to 1 of 4 treatment groups. Throughout the study, the patients were placed in a metabolic unit; their body weights and intakes of oral rehydration solution, water, and formula diets, in addition to outputs of stool, urine, and vomit, were measured and recorded at 24-hour intervals. Four different diets were used in this study: diet 1, yogurt-based formula; diet 2, soy-based formula; diet 3, hydrolyzed protein-based formula; and diet 4, amino acid–based formula. Throughout the study, only these formula diets were fed to the children. The data showed that children fed the yogurt-based diet (diet 1) or the amino acid–based diet (diet 4) had a significant reduction in stool output and in the duration of diarrhea. The use of an inexpensive and worldwide-available yogurt-based diet is recommended as the first choice for the nutritional management of mild to moderate PD. For the few complicated PD cases, when available, a more complex amino acid–based diet should be reserved for the nutritional management of these unresponsive and severe presentations. Soy-based or casein-based diets do not offer any specific advantage or benefits and do not seem to have a place in the management of PD. 相似文献