全文获取类型
收费全文 | 27955篇 |
免费 | 2467篇 |
国内免费 | 467篇 |
专业分类
耳鼻咽喉 | 119篇 |
儿科学 | 423篇 |
妇产科学 | 290篇 |
基础医学 | 2431篇 |
口腔科学 | 522篇 |
临床医学 | 3438篇 |
内科学 | 2469篇 |
皮肤病学 | 166篇 |
神经病学 | 1397篇 |
特种医学 | 503篇 |
外科学 | 2112篇 |
综合类 | 5548篇 |
现状与发展 | 3篇 |
一般理论 | 6篇 |
预防医学 | 7142篇 |
眼科学 | 196篇 |
药学 | 2678篇 |
19篇 | |
中国医学 | 739篇 |
肿瘤学 | 688篇 |
出版年
2024年 | 65篇 |
2023年 | 527篇 |
2022年 | 917篇 |
2021年 | 1271篇 |
2020年 | 1268篇 |
2019年 | 1002篇 |
2018年 | 987篇 |
2017年 | 919篇 |
2016年 | 923篇 |
2015年 | 1130篇 |
2014年 | 2265篇 |
2013年 | 2410篇 |
2012年 | 2047篇 |
2011年 | 2106篇 |
2010年 | 1782篇 |
2009年 | 1532篇 |
2008年 | 1528篇 |
2007年 | 1305篇 |
2006年 | 1141篇 |
2005年 | 929篇 |
2004年 | 734篇 |
2003年 | 614篇 |
2002年 | 461篇 |
2001年 | 361篇 |
2000年 | 319篇 |
1999年 | 264篇 |
1998年 | 258篇 |
1997年 | 203篇 |
1996年 | 171篇 |
1995年 | 142篇 |
1994年 | 122篇 |
1993年 | 116篇 |
1992年 | 97篇 |
1991年 | 121篇 |
1990年 | 95篇 |
1989年 | 90篇 |
1988年 | 94篇 |
1987年 | 79篇 |
1986年 | 62篇 |
1985年 | 72篇 |
1984年 | 69篇 |
1983年 | 51篇 |
1982年 | 60篇 |
1981年 | 33篇 |
1980年 | 55篇 |
1979年 | 25篇 |
1978年 | 19篇 |
1977年 | 16篇 |
1976年 | 9篇 |
1975年 | 12篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
Koel Dutt P N Agarwal Rajdeep Singh Vikas Singh Tomar 《The Indian journal of surgery》2015,77(1):62-64
Haemophilia is a common cause of genetically inherited bleeding disorders. Pseudotumours occur in 1–2 % of persons with severe forms of haemophilia. These are a result of repeated haemorrhage into soft tissues, subperiosteum or a site of bone fracture with inadequate resorption of the extravasated blood. There are a number of therapeutic alternatives for this dangerous condition: surgical removal, percutaneous management, irradiation, embolization etc. In this case report, we describe the natural history, clinical course and successful surgical management of a patient with haemophilia who presented with a massive pseudotumour. We also briefly review the relevant literature on the various therapeutic modalities that have been implemented in the management of this rare complication. Though surgeons may be averse to operate on haemophiliacs, primary surgical management as done in our case may prove to be the definitive treatment option for such patients. 相似文献
2.
动脉导管未闭(PDA)是早产儿常见疾病,目前早产儿PDA的自然发展过程仍未完全明确,PDA发生的有些高危因素仍存在争议,对PDA是否进行药物、手术干预,以及何时进行药物、手术干预仍存在争议。尽管已经有相当多的证据证实动脉导管持续开放可能有害,但目前尚缺乏关闭导管治疗方案的远期益处或害处的相关证据。大多数临床试验旨在评估短期导管开放对患儿的影响。目前尚无评估动脉导管持续开放对早产儿死亡率及并发症影响的临床试验。近年来PDA治疗上最大的变化是减少对PDA的治疗。该文重点总结胎龄28周早产儿PDA的治疗策略。 相似文献
3.
《Gaceta sanitaria / S.E.S.P.A.S》2015,29(5):390-392
Chronic obstructive pulmonary disease (COPD) is a significant health problem in developed countries. We aimed to estimate the prevalence of COPD in a single Spanish healthcare area. We also aimed to assess if there are any differences in prevalence and spirometry use among primary care services by utilizing already registered information. We designed a cross-sectional study to determine the prevalence of COPD and the performance of spirometries in each primary care service. A total of 8,444 patients were diagnosed with COPD, with a prevalence of 2.6% for individuals older than 39 years. The prevalence increased with age and was much higher in men. Significant heterogeneity was found in the prevalence of COPD and spirometry use among primary care services. COPD was underdiagnosed and there was wide variability in spirometry use in our area. Greater efforts are needed to diagnose COPD in order to improve its clinical outcomes and to refine registries so that they can be used as reliable sources of information 相似文献
4.
BackgroundBurnout in teachers has been linked to decreased effectiveness as educators, and suboptimal interactions with students. The purpose of this pilot study was to assess the outcomes of a brief Stress Management and Resiliency Training (SMART) program for public school staff.Materials and methodsThis single-arm, prospective trial involved an investigation of the effects of a brief SMART program on participant stress, anxiety, resilience, gratitude, happiness, life satisfaction, and quality of life (QOL).ResultsSignificant improvements were noted in participant anxiety (P < 0.001), stress (P = 0.003), gratitude (P = 0.001), happiness (P < 0.001), life satisfaction (P < 0.001), and QOL (P < 0.001). Most participants reported that the skills learned positively affected interactions with students (77.2%) and coworkers (72.2%).ConclusionsThe SMART program showed promising effectiveness for improving anxiety, stress, gratitude, happiness, life satisfaction and QOL. Given the prevalence and impact of teacher burnout, larger, controlled trials and broader dissemination of the intervention are warranted. 相似文献
5.
Elisa Giani Andrea Enzo Scaramuzza Gian Vincenzo Zuccotti 《World journal of diabetes》2015,6(8):999-1004
Technologies for diabetes management, such as continuous subcutaneous insulin infusion (CSII) and continuous glucose monitoring (CGM) systems, have improved remarkably over the last decades. These developments are impacting the capacity to achieve recommended hemoglobin A1c levels and assisting in preventing the development and progression of micro- and macro vascular complications. While improvements in metabolic control and decreases in risk of severe and moderate hypoglycemia have been described with use of these technologies, large epidemiological international studies show that many patients are still unable to meet their glycemic goals, even when these technologies are used. This editorial will review the impact of technology on glycemic control, hypoglycemia and quality of life in children and youth with type 1 diabetes. Technologies reviewed include CSII, CGM systems and sensor-augmented insulin pumps. In addition, the usefulness of advanced functions such as bolus profiles, bolus calculators and threshold-suspend features will be also discussed. Moreover, the current editorial will explore the challenges of using these technologies. Indeed, despite the evidence currently available of the potential benefits of using advanced technologies in diabetes management, many patients still report barriers to using them. Finally this article will highlight the importance of future studies tailored toward overcome these barriers to optimizing glycemic control and avoiding severe hypoglycemia. 相似文献
6.
医科院校学生心理危机管理浅探 总被引:2,自引:0,他引:2
结合医科院校学生心理危机管理的实践,阐述大学生心理危机的内涵、类型、特征及心理危机管理的特性,并从建立预警系统、增设心理委员、危机处理的专业化及危机干预策略等方面探讨在医科院校加强学生心理危机管理的对策。 相似文献
7.
A discrete time optimal control for linear time-delay systems is developed to ensure that all closed-loop eigenvalues will lie inside a circular region centred at (β;, 0) with radius α. It is shown that by suitable manipulations the problem can be reduced to a standard discrete time quadratic regulator problem. An illustrative example is included to demonstrate the applicability of the proposed method. 相似文献
8.
Several studies have demonstrated that a descending dopaminergic pathway innervates the dorsal and the intermediate gray matter of the spinal cord and have suggested that this pathway is involved in pain modulation and in the control of autonomie functions. Other studies have also demonstrated the presence of dopamine (DA) and DA metabolites as well as of DA receptors in the ventral cord. There is also evidence for the implication of DA in the control of motor functions at the spinal level. The occurrence of a dopaminergic innervation in the ventral horn has been, however, disputed until recently. But recent work has demonstrated that the motoneural cell groups in the ventral horn (lamina IX) are a target for descending dopaminergic fibers. In addition, the possibility that DA is a mediator of primary afferent fibers has also been postulated. Finally, the occurrence of dopaminergic cell bodies has been suggested in the spinal cord. This indicates that DA is probably implicated in a complex manner in spinal functions. In the present paper the possible involvement of DA in sensory and in motor functions at spinal level will be discussed in view of neurochemical observations made in polyarthritic rats, in which pain-related behavior and reduction of locomotor activity associated with a marked decrease in mobility, are observed. 相似文献
9.
10.
Research has shown that increasing numbers of teenagers are going online to find health information, but it is unclear whether there are disparities in the prevalence of online health seeking among young Internet users associated with social and economic conditions. Existing literature on Internet uses by adults indicates that low income, less educated, and minority individuals are less likely to be online health seekers. Based on the analysis of data from the Pew Internet and American Life Project for the US, this study finds that teens of low education parents are either as likely as or even more likely than teens of high education parents to seek online health information. Multiple regression analysis shows that the higher engagement in health seeking by teens of low education parents is related to a lower prevalence of parental Internet use, suggesting that some of these teens may be seeking online health information on behalf of their low education parents. Implications of these findings are discussed in relation to the issues of the digital divide and digital empowerment. 相似文献