全文获取类型
收费全文 | 25213篇 |
免费 | 2557篇 |
国内免费 | 382篇 |
专业分类
耳鼻咽喉 | 241篇 |
儿科学 | 688篇 |
妇产科学 | 352篇 |
基础医学 | 1293篇 |
口腔科学 | 768篇 |
临床医学 | 5067篇 |
内科学 | 3121篇 |
皮肤病学 | 254篇 |
神经病学 | 2073篇 |
特种医学 | 526篇 |
外科学 | 2506篇 |
综合类 | 1748篇 |
一般理论 | 6篇 |
预防医学 | 5408篇 |
眼科学 | 148篇 |
药学 | 2515篇 |
67篇 | |
中国医学 | 444篇 |
肿瘤学 | 927篇 |
出版年
2024年 | 84篇 |
2023年 | 648篇 |
2022年 | 1098篇 |
2021年 | 1378篇 |
2020年 | 1401篇 |
2019年 | 1429篇 |
2018年 | 1356篇 |
2017年 | 1262篇 |
2016年 | 1194篇 |
2015年 | 1018篇 |
2014年 | 1883篇 |
2013年 | 2554篇 |
2012年 | 1288篇 |
2011年 | 1454篇 |
2010年 | 1066篇 |
2009年 | 1072篇 |
2008年 | 1084篇 |
2007年 | 1031篇 |
2006年 | 813篇 |
2005年 | 765篇 |
2004年 | 618篇 |
2003年 | 522篇 |
2002年 | 434篇 |
2001年 | 422篇 |
2000年 | 333篇 |
1999年 | 271篇 |
1998年 | 237篇 |
1997年 | 201篇 |
1996年 | 198篇 |
1995年 | 155篇 |
1994年 | 158篇 |
1993年 | 111篇 |
1992年 | 106篇 |
1991年 | 82篇 |
1990年 | 63篇 |
1989年 | 54篇 |
1988年 | 39篇 |
1987年 | 44篇 |
1986年 | 36篇 |
1985年 | 43篇 |
1984年 | 39篇 |
1983年 | 20篇 |
1982年 | 22篇 |
1981年 | 18篇 |
1980年 | 13篇 |
1979年 | 10篇 |
1978年 | 5篇 |
1976年 | 2篇 |
1975年 | 7篇 |
1974年 | 5篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
Margaret A. Chambers 《Journal of clinical nursing》1998,7(3):201-208
? This paper focuses on some issues in the assessment of clinical practice of particular interest to the author. ? The assessment of students of nursing in clinical practice is acknowledged as a long-standing and difficult problem. ? There is little consensus as to what is meant by the term competence when applied to clinical nursing practice, making the assessment of clinical practice a mainly subjective process. ? The English National Board (1989) has distinguished the term mentor as meaning counsellor and guide, nevertheless the roles of mentor and assessor are frequently confused. ? It is suggested that nurses are equally accountable for the accurate assessment of student nurses' clinical skills as they are for their own practice. ? The validity and reliability of tools used to assess clinical practice are difficult to establish, making objective assessment complex at best, and impossible at worst. ? The assessment of the reflective process has been suggested as one way out of the dilemma, but the ability to think and to write does not necessarily translate into competent clinical practice. 相似文献
52.
A. N. THOMSON 《Medical education》1992,26(5):364-367
In many examinations, communication skills tend to be treated as if they are a single attribute independent of the context of the communication. However, it is clear that such assessments are confounded by candidates' knowledge or lack of knowledge of the medical issues about which they are communicating. In the 1990 Part One examination for Membership of the Royal New Zealand College of General Practitioners candidates were provided with all the essential knowledge relevant to the problem they were to communicate about. Despite this, performance was still seen to be context specific, demonstrating that such specificity is not purely knowledge related. Candidates completing the examination were observed to share information about the cases with candidates about to commerce. There was no evidence that performance was enhanced by such breaches in examination security. 相似文献
53.
A. G. BIRKS H. IZZARD D. R. MORROLL J. R. PRIOR S. A. TROUP B. A. LIEBERMAN I. L. MATSON 《International journal of andrology》1994,17(6):289-291
The World Health Organization (WHO) laboratory manual (1992) states that assessment of sperm motility can be performed at either 37O C or room temperature (20–24O C). The motility of spermatozoa in 44 semen samples (22 fresh samples and 22 frozen-thawed samples) was assessed at both of these temperatures and a significant difference in the motility profiles was noted, specifically an increase at 37O C in the percentage (expressed here as median and ranges) of spermatozoa with excellent progressive motility and an overall increase in the percentage with total progressive motility. With fresh samples the excellent progressive motility increased from 41 (19–53) to 54 (30–66) and the overall motility from 58.5 (39–74) to 65.0 (40–79). With the frozen—thawed samples the excellent motility increased from 14 (1–33) to 25 (6–45) and the overall motility from 30.5 (14–51) to 33.0 (16–52). As the WHO laboratory manual was published. 'In response to a growing need for the standardisation of procedures for the examination of human spermatozoa' it is proposed that only one temperature for routine analysis should be used, namely 37O C, which may have more physiological relevance and eliminate effects of fluctuations in ambient laboratory temperature. 相似文献
54.
55.
论AB类医疗设备使用率考核方法 总被引:2,自引:1,他引:1
对AB类医疗设备使用率的考核是了解设备使用情况和效益的有效方法。本文通过几年来对南京总医院AB类医疗设备使用率的年度考核,摸索总结出一套行之有效的考核方法,为今后新型医疗设备使用率考核提供了可循的依据。 相似文献
56.
M. NISKANEN A. KARI P. NIKKI E. IISALO L. KAUKINEN V. RAUHALA E. SAARELA 《Acta anaesthesiologica Scandinavica》1994,38(6):587-593
Prognostic factors determining the outcome from intensive care were studied in 952 patients admitted to 25 Finnish ICUs after gastroenterologic emergency. Logistic regression analysis was used to create predictive models based on the APACHE II–system. The models were constructed by using data from a random two–thirds of the study population and validated in the remaining independent one–third together with the original APACHE II–index. The Acute Physiology Score, age, and a pre–existing liver disease were the three most important determinants of outcome. The inclusion of the TISS score describing the intensity of treatment into a model did not enhance the accuracy of the prediction. Our models were better calibrated than the original APACHE II–equation when tested by the goodness–of–fit –statistics. These statistical models may help the clinicians to predict the outcome for an individual patient by providing them information about the relative impacts of predictive factors or about the probability of death. These probabilities should be interpreted cautiously, taking into acount the limitations of statistical methods. This is especially important when assessing the highrisk patients. Their number in our study was too low for accurate outcome prediction. 相似文献
57.
实施绩效考核的实践和体会 总被引:7,自引:0,他引:7
介绍绍兴市人民医院实施绩效考核的经验和体会.其经验在于:明确考核定位,把考核的首要目的定位于医院管理目标的实现和对管理过程的一种控制;运作方式是:制定考核标准、确立考核周期、明确考核部门及人员,使绩效考核真正落到了实处,收到了显著效果. 相似文献
58.
E. Johansson S. Mnsson R. Wirestam J. Svensson J.S. Petersson K. Golman F. Sthlberg 《Magnetic resonance in medicine》2004,51(3):464-472
Cerebral perfusion was assessed with 13C MRI in a rat model after intravenous injections of the 13C-labeled compound bis-1,1-(hydroxymethyl)-1-13C-cyclopropane-D8 in aqueous solutions hyperpolarized by dynamic nuclear polarization (DNP). Since the tracer acted as a direct signal source, several of the problems associated with techniques based on traditional dynamic susceptibility contrast (DSC) MRI contrast agents were avoided. Maps of cerebral blood flow (CBF), cerebral blood volume (CBV), and mean transit time (MTT) were calculated. The MTT was determined to be 2.8 +/- 0.8 sec. However, arterial partial-volume effects in the animal model prevented accurate absolute quantification of CBF and CBV. It was demonstrated that depolarization of the hyperpolarized 13C tracer via relaxation and the imaging sequence had little influence on CBF assessment when the time resolution of the imaging sequence was short compared to the MTT. However, CBV and MTT were increasingly underestimated as MTT or the depolarization rate increased if depolarization was not taken into account. With a modified bolus-tracking theory depolarization could be compensated for, assuming that the depolarization rate was known. Three separate compensation methods were investigated experimentally and by numerical simulations. 相似文献
59.
I. Bostancý Y. Dallar R. Ünsal Sac E. Karakoc B. Doganay 《Pediatric allergy and immunology》2007,18(8):687-691
An increased frequency of allergic reactions to latex has been reported in specific populations with chronic latex exposure. However, relevance of latex allergy to children and adolescents with type I diabetes mellitus (DM1) has not been studied yet. The aim of the studty is to assess latex allergy risk in children and adolescents with DM1. Thirty-nine children with DM1 and 35 controls were enrolled. In a case-control study, we applied to all subjects a standard questionnaire, and specific Immunoglobulin E (IgE) concentrations for latex, common aeroallergens, and food-allergens were measured in serum samples. Latex exposure rates by means of medical procedures, operations, and latex glove usage were not different between DM1 and controls. Symptoms due to latex exposure were not determined in both groups. Three (7.7%) subjects in DM1 tested positive for latex-specific antibodies (LSIE), whereas no subject in controls. Diabetics that tested positive for latex-specific antibodies had the disease for three, 5 and 8 years. Nine (23.1%) of diabetics, and two (5.7%) of controls were atopic (p = 0.04). In our investigation, we found that children and adolescents with DM1 are not a risk group for latex allergy, and LSIE in children with DM1 was not accompanied by symptoms of latex allergy, or, presumably, increased risk of latex anaphylaxis. 相似文献
60.