全文获取类型
收费全文 | 6925篇 |
免费 | 365篇 |
国内免费 | 96篇 |
专业分类
耳鼻咽喉 | 22篇 |
儿科学 | 50篇 |
妇产科学 | 30篇 |
基础医学 | 781篇 |
口腔科学 | 142篇 |
临床医学 | 574篇 |
内科学 | 538篇 |
皮肤病学 | 35篇 |
神经病学 | 233篇 |
特种医学 | 218篇 |
外科学 | 468篇 |
综合类 | 771篇 |
预防医学 | 2414篇 |
眼科学 | 42篇 |
药学 | 726篇 |
5篇 | |
中国医学 | 258篇 |
肿瘤学 | 79篇 |
出版年
2023年 | 55篇 |
2022年 | 128篇 |
2021年 | 195篇 |
2020年 | 204篇 |
2019年 | 173篇 |
2018年 | 131篇 |
2017年 | 154篇 |
2016年 | 176篇 |
2015年 | 166篇 |
2014年 | 412篇 |
2013年 | 439篇 |
2012年 | 443篇 |
2011年 | 560篇 |
2010年 | 364篇 |
2009年 | 350篇 |
2008年 | 384篇 |
2007年 | 379篇 |
2006年 | 307篇 |
2005年 | 248篇 |
2004年 | 223篇 |
2003年 | 194篇 |
2002年 | 187篇 |
2001年 | 146篇 |
2000年 | 114篇 |
1999年 | 111篇 |
1998年 | 77篇 |
1997年 | 109篇 |
1996年 | 74篇 |
1995年 | 71篇 |
1994年 | 70篇 |
1993年 | 50篇 |
1992年 | 52篇 |
1991年 | 43篇 |
1990年 | 43篇 |
1989年 | 20篇 |
1988年 | 41篇 |
1987年 | 24篇 |
1986年 | 30篇 |
1985年 | 46篇 |
1984年 | 33篇 |
1982年 | 32篇 |
1981年 | 25篇 |
1980年 | 36篇 |
1979年 | 39篇 |
1978年 | 34篇 |
1977年 | 34篇 |
1976年 | 39篇 |
1975年 | 27篇 |
1974年 | 21篇 |
1973年 | 20篇 |
排序方式: 共有7386条查询结果,搜索用时 15 毫秒
1.
Claire Letournel François Babinet Bénédicte Allard Vincent Montecot 《Néphrologie & thérapeutique》2019,15(1):51-58
Objective
The “Centre Hospitalier Francois Dunan” is located on an isolated island and ensures patients care in hemodialysis thanks to telemedicine support. Many research studies have demonstrated the importance of hemodialysis fluids composition to reduce morbidity in patients on chronic hemodialysis. The aim of this study was to identify the risks inherent in the production of dialysis fluids in a particular context, in order to set up an improvement action plan to improve risk control on the production of dialysis fluids.Methods
The risk analysis was conducted with the FMECA methodology (Failure Mode, Effects and Criticality Analysis) by a multi professional work group. Three types of risk have been reviewed: technical risks that may impact the production of hemodialysis fluids, health risks linked with chemical composition and health risks due to microbiological contamination of hemodialysis fluids.Results
The work group, in close cooperation with the expert staff of the dialysis center providing telemedicine assistance, has developed an action plan in order to improve the control of the main risks brought to light by the risk analysis.Conclusion
The exhaustive analysis of the risks and their prioritisation have permitted to establish a relevant action plan in this improving quality of dialysis fluids approach. The risk control of dialysis fluids is necessary for the security of dialysis sessions for patients, even more when these sessions are realized by telemedicine in Saint-Pierre-et-Miquelon. 相似文献2.
High-pressure injection injuries (HPII) caused by water swelling sealant are rare at present. The patient generally has small-sized skin lesions, and the misleadingly benign presentation may cause delayed treatment at the early stage of management. In addition, radiographic examination may be underestimated. Subsequently, the inadequate surgical intervention may cause tissue necrosis and poor prognosis. Furthermore, the early recognition of water swelling sealant injected into tissue and emergent surgical intervention are the key to successful management for the patient with HPII caused by injecting water swelling sealant to tissue. 相似文献
3.
Background: It is widely known that a proportion of university students use drugs. However, much less is known about how they source and supply their drugs. Objectives: In this article, we investigate student drug trading activity, including how they obtained their drugs, whether they sold drugs, and the extent to which their drug trading might be described as a form of “social supply”. Methods: A survey was conducted of all students across seven of the nine universities of Wales. In total, 7855 students submitted a questionnaire and 1877 of these reported drug use in the current academic year. All students who reported using one or more illegal drugs in the current academic year were asked how they obtained their drugs, how they funded their drug use, whether they had sold, traded or given away illegal drugs, along with their motives for drug trading. Results: The results showed that about half of users obtained drugs solely from friends and associates and one-fifth obtained them solely from external dealers. One-quarter used friends and associates as well as external markets. In many cases, supplying drugs amounted to sharing them or giving them away. However, over one-third of students said that they had sold drugs. Conclusions: Overall, the methods of sourcing and supplying drug among university students shares features of both “social supply” and “traditional” drug markets. We conclude that the student drug market investigated is best described as a “hybrid” combination of both. 相似文献
4.
《Journal of the American College of Surgeons》2020,230(4):585-593
- Download : Download high-res image (295KB)
- Download : Download full-size image
5.
《International journal of hygiene and environmental health》2019,222(7):1030-1037
In the Netherlands, safe and sufficient drinking water is provided to the general population by ten drinking water companies. To guarantee safe drinking water the World Health Organization (WHO) developed a Water Safety Plan (WSP), a Risk Assessment and a Risk Management (RA/RM) framework. The objective of the study was to identify legally required RA approaches, to document application of RA/RM activities at Dutch drinking water companies and to determine to what extent these RA/RM activities as a whole cover all the elements of the WHO WSP approach. This study could be of interest to both managers of large water utilities and decision makers.The assessment was performed by means of a policy review and interviews with two to four staff members involved in RA/RM from all ten Dutch drinking water companies combined with a joint workshop. The drinking water companies are well aware of the potential hazards and risks that can influence the drinking water quality. To guarantee the supply of safe and sufficient drinking water, the Dutch drinking water sector uses six different legally required RA/RM approaches. This study shows that by using the six legally required RA/RM approaches, all WSP steps are covered. WSP entails a generic risk assessment for identifying all hazards and hazardous events from source to tap, whereas the six legally required RA/RM each focus on specific risks at an advanced level. Each risk assessment provides information on specific hazards and hazardous events covering a part of the water supply chain. These legal requirements are complemented with additional RA/RM activities at sector and water company level such as codes of practices and standard operating procedures. The outcomes of all RA/RM approaches combined provide information from source to tap. When using multiple RA/RM approaches, it is crucial to share and combine information derived from the different activities. 相似文献
6.
7.
8.
目的 :探讨遏制急性胰腺炎向重症转化的非手术治疗策略。方法 :将4年间收治的286例轻型急性胰腺炎分为对照组和治疗观察组。对照组采取常规非手术治疗措施;观察组加用改善胰腺微循环,防治细胞钙超载和抑制胰酶的治疗方法。结果 :对照组144轻型有20例转化为重症胰腺炎,14例发生全身性并发症;观察组142例轻型有8例转化为重症,2例出现全身性并发症。观察组重症患者血C-反应蛋白和Balthazar CT严重度指数在治疗后各时点较对照组明显降低。结论 :在常规治疗的基础上加用改善胰腺微循环,防治细胞钙超载和抑制胰酶的治疗措施可能有助于阻止轻型急性胰腺炎向重症化发展。 相似文献
9.
S. Süreyya
zbek Remide Arkun Refik Killi Ayenur Memi Aynur Dadeviren Erkan Sevin 《Journal of clinical ultrasound : JCU》1995,23(4):233-238
Image-directed color Doppler ultrasonography (ICDUS) studies of 86 patients with superficial solid masses yielded significantly lower resistive index (RI) values in acute inflammatory lesions, but no significant difference between the maximum systolic flow velocities (S) of the patient groups with malignant, benign, and acute inflammatory lesions. When analyzed separately, the malignant soft-tissue tumor subgroup was shown to have significantly higher mean RI compared to that of the malignant node subgroup. We conclude that RI may be useful in the differentiation of acute inflammatory masses from other pathological entities. Malignant soft-tissue tumors, especially sarcomas, may have different Doppler features from those of carcinomatous tumors. © 1995 John Wiley & Sons, Inc. 相似文献
10.
艾灸对30例健康人甲皱微循环及血液流变学的影响 总被引:3,自引:0,他引:3
目的:探讨艾灸对健康人甲皱微循环及血液流变学的影响。方法:选择健康学员及武警战士各30例,年龄20-22岁,应用江苏协达公司生产的XDM-1型微循环电脑检测仪及北京世帝科学仪器公司生产的LG-R-80血液粘度计,LG-B-190型红细胞变形/聚集测试仪。固定专人操作,分别于艾灸前及艾灸后,测试甲皱微循环及血液流变学各项指标的变化。结果:艾灸八邪及三阴交穴后,甲皱微循环各项指标均有明显变化,经统计学处理,红细胞聚集程度、血流速度、流态积分、管周积分均有显著性差异(P<0.05),其余各项指标虽有不同程度的改变,但无统计学意义(P>0.05);血液流变学各项指标亦有明显变化,经统计学处理,全血低切相对粘度、全血低切还原粘度、红细胞刚性指数、红细胞聚集指数及血浆纤维蛋白原都有非常显著性差异(P<0.01),全血高切相对粘度有显著性差异(P<0.05),其余各项指标虽有不同程度的改变,但无统计学意义(P>0.05)。结论:艾灸八邪及三阴交穴后可明显改善红细胞聚集程度,降低血液粘度,加快血流速度,降低外周血管阻力。 相似文献