全文获取类型
收费全文 | 13542篇 |
免费 | 1391篇 |
国内免费 | 272篇 |
专业分类
耳鼻咽喉 | 52篇 |
儿科学 | 49篇 |
妇产科学 | 52篇 |
基础医学 | 449篇 |
口腔科学 | 461篇 |
临床医学 | 2821篇 |
内科学 | 3232篇 |
皮肤病学 | 48篇 |
神经病学 | 845篇 |
特种医学 | 230篇 |
外国民族医学 | 1篇 |
外科学 | 759篇 |
综合类 | 2241篇 |
一般理论 | 2篇 |
预防医学 | 2534篇 |
眼科学 | 109篇 |
药学 | 802篇 |
8篇 | |
中国医学 | 331篇 |
肿瘤学 | 179篇 |
出版年
2024年 | 87篇 |
2023年 | 350篇 |
2022年 | 374篇 |
2021年 | 572篇 |
2020年 | 570篇 |
2019年 | 599篇 |
2018年 | 584篇 |
2017年 | 630篇 |
2016年 | 598篇 |
2015年 | 541篇 |
2014年 | 887篇 |
2013年 | 967篇 |
2012年 | 815篇 |
2011年 | 859篇 |
2010年 | 634篇 |
2009年 | 677篇 |
2008年 | 773篇 |
2007年 | 783篇 |
2006年 | 626篇 |
2005年 | 558篇 |
2004年 | 445篇 |
2003年 | 398篇 |
2002年 | 360篇 |
2001年 | 299篇 |
2000年 | 208篇 |
1999年 | 157篇 |
1998年 | 136篇 |
1997年 | 137篇 |
1996年 | 86篇 |
1995年 | 70篇 |
1994年 | 85篇 |
1993年 | 54篇 |
1992年 | 55篇 |
1991年 | 42篇 |
1990年 | 40篇 |
1989年 | 31篇 |
1988年 | 23篇 |
1987年 | 19篇 |
1986年 | 24篇 |
1985年 | 17篇 |
1984年 | 11篇 |
1983年 | 5篇 |
1982年 | 8篇 |
1981年 | 3篇 |
1980年 | 4篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1973年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
老年人急性心肌梗塞的临床特点 总被引:2,自引:0,他引:2
王莹 《心血管康复医学杂志》2006,15(2):152-154
目的:研究60岁以上老年人急性心肌梗塞的临床特点。方法:对86例老年人急性心肌梗塞资料进行临床分析,并与同期255例小于60岁的急性心肌梗塞病人进行对比。结果:老年急性心肌梗塞患者女性的比例较60岁以下者明显增多(P<0.01),老年无痛性心肌梗塞比例(30.5%)明显增多(P<0.05),并发症心力衰竭(P<0.01)、心律失常(P< 0.05),死亡率(P<0.01)也明显增多。结论:老年人无痛性急性心肌梗塞多见,并发症发生率、死亡率高,应予重视。 相似文献
52.
实施人本管理打造医院核心竞争力 总被引:32,自引:7,他引:25
医疗机构在激烈的竞争中,要保证持续发展,关键在于培训核心竞争力。人才是医院最核心的竞争力,因此必须实施人本管理。要提升人力资源的价值,以正确的目标引导人,以科学的方式管理人,以完善的机制激励人,以战略的眼光培养人,以终生的培训塑造人,以优秀的文化武装人,建立一个自主自足,自我控制,自我发展,自我完善的管理机制,激发全院员工的创造力,增强医院的凝聚力,人尽其才,才尽其用,提高工作效率,以提升医院效益。 相似文献
53.
Kazuhiro Sakata Akio Ohtaki Masaaki Aiba Susumu Ishikawa Yoshimi Otani Yasuo Morishita 《Surgery today》1997,27(1):88-89
We report herein the case of a 77-year-old man with a left ventricular tumor originating from the papillary muscle of the left ventricular wall, in whom a successful tumor resection with mitral valve replacement was performed. The pathological diagnosis of the tumor was confirmed as cardiac fibroma. His postoperative course was uneventful and he is currently well with no signs of recurrence 2 years after surgery. 相似文献
54.
测定分析不同膳食特点地区975例年龄45~74岁中老年人的血红蛋白及其与膳食营养素的关系。结果牧民及城市居民贫血率低,北京及新疆托里分别为7.6%和4.6%。男性比女性血红蛋白高,血红蛋白随年龄增加而降低。相关分析结果血红蛋白与膳食热能、蛋白质、动物蛋白质与总蛋白质比值呈显著正相关。结果说明血红蛋白可用于中老年人营养状态监测。 相似文献
55.
T. E. CEDERHOLM A. B. BERG E. K. JOHANSSON K. H. HELLSTRÖM J. E. W. PALMBLAD 《European journal of clinical investigation》1994,24(9):615-620
Abstract Essential fatty acid (FA) deficiency, which may accompany protein-energy malnutrition (PEM), has been associated with impaired inflammatory reactions. We evaluated this relationship by analysing FA profiles and delayed cutaneous hypersensitivity in 20 malnourished elderly non-cancer patients and in 20 age-matched control patients. As indicated by serum cholesterol and serum triglycerides, the lipid levels were decreased by about one-third in the subjects with PEM. In comparison with the controls, there was a reduction in the ω 3 FA (e.g. eicosapentanoate) in total serum lipids (mgl-1 ) and serum phospholipids (%) of 40% and 47%, respectively. Reductions in serum ω 6 FA (e.g. linoleate and arachidonate) levels corresponded to the drop in total FA concentrations (30%). The cutaneous hypersensitivity was impaired in 14 of the malnourished patients. The magnitude of the skin reaction was positively correlated ( P < 0·05) to the concentrations of eicosapentanoate in serum lipids and serum phospholipids, as well as to the linoleate concentration in total serum lipids. Six of the malnourished patients took part in a nutritional intervention programme for 3 months. In parallel with an improvement in the nutritional status there was a 35% increase ( P < 0·05) in the total ω 3 FA serum concentration. Negative skin tests became positive and the median skin induration enlarged threefold ( P < 0·05). Thus, deficiency of ω 3 FA might be one factor contributing to cutaneous anergy in elderly malnourished patients. 相似文献
56.
Dietary intake in the elderly estimated by a 24 hour recall and a food frequency questionnaire 总被引:1,自引:0,他引:1
P. Caughey C. E. A. Seaman† D. A. Parry† D. L. Farquhar‡ W. J. MacLennan§ R. Prescott§ 《Journal of human nutrition and dietetics》1994,7(3):209-213
Two hundred and thirty-five tenants living in sheltered housing in Scotland were surveyed to identify the extent of under-nutrition and the social factors which contribute to its development. A validated 24 h recall and the nutrient checklist published by NAGE were used to evaluate patterns of dietary intake. A questionnaire was developed which included scales designed to measure depression, social engagement, cognitive function, mobility and functional ability. The results show considerable evidence of a number of major nutrients in which there were low intakes. In order to express the extent of poor nutrition, a nutrient score was developed where points are awarded based on the number of nutrients falling below the Lower Reference Nutrient Intake, the Estimated Average Requirement or below half the daily Estimated Average Requirement. 相似文献
57.
毕新生 《右江民族医学院学报》1994,16(2):32-34
对28例青年人胃癌的临床及病理分析结果表明,其发病具有症状隐匿、病程短、进展快的特点,本组病例从出现症状到漏诊在6个月内为57.1%(16例),首发症状以上腹部疼痛、吐血、黑便多见,病理特征以结节蕈伞型、高分化腺癌多见。 相似文献
58.
主动回避条件反应率>80%的老年大鼠为学习好组,<30%的为学习差组。学习好组在高频短串刺激后颗粒细胞层出现海马长时程突触增强(LTP)效应:颗粒细胞核内Ag-NOR面积/胞核面积比值平均为0.154±0.0043;单个胞核内Ag-NOR平均为3.051±0.2212个,学习差组高频短串刺激引起颗粒细胞层群峰电位长时程抑制;颗粒细胞核内Ag-NOR面积/胞核面积比值平均为0.077±0.0023;单个胞核内Ag-NOR平均为1.839±0.1421个,2组间3指标均有显著差异,表明年老大鼠学习能力与LTP效应有关,学习差的老年大鼠海马齿状回颗粒细胞rDNA的转录活性较学习好的明显降低。 相似文献
59.
Promoting autonomy and independence for older people within nursing practice: a literature review 总被引:1,自引:0,他引:1
Sue Davies Bsc Msc RGN RHV Sara Laker BA RGN Lorraine Ellis BA MSc RGN RNT 《Journal of advanced nursing》1997,26(2):408-417
The principles of promoting autonomy and independence underpin many approaches to improving the quality of nursing care for older people in whatever setting, and are in line with wider developments in health care such as the Patient's Charter. However, these concepts require careful definition if nursing practices which might promote autonomy and independence are to be identified. Although the generalizability of the research-based literature in this field is limited by a focus upon older people in continuing-care settings, a review of the literature found a number of indicators associated with attempts to promote patient autonomy and independence. These were grouped into the following categories: systems of care delivery which promote comprehensive individualized assessment and multidisciplinary care planning; attempts to encourage patients/clients to participate in decisions about their care; patterns of communication which avoid exerting power and control over patients/clients and attempts to modify the environment to promote independence and minimize risk. It is suggested that the review identifies a number of principles for nursing practice which can be applied in a range of care settings in order to promote the autonomy and independence of older people. 相似文献
60.
Dianne P. Goeman Robyn E. O'Hehir Christine Jenkins Simon L. Scharf Jo A. Douglass 《The clinical respiratory journal》2007,1(2):99-105
Introduction: Asthma mortality has declined overall because of a range of public health initiatives. In western countries, the majority of asthma deaths now occur in people over the age of 50. The reasons for the poorer response of older age groups to public health asthma initiatives are not known. Objectives: We undertook a study to investigate the disease perspectives of older people with asthma and barriers which may exist and prevent optimal asthma care. Methods: Fifty‐five participants (16 male and 39 female) aged over 50 from an inner city, suburban area and a rural region were recruited. Lung function was measured, and questionnaire data on asthma symptoms, knowledge and control, medication use and respiratory health were collected. Participants were also interviewed in‐depth, and the quantitative and qualitative data were triangulated. Results: Participants with a duration of asthma for >30 years reported significantly fewer symptoms and better quality of life irrespective of asthma severity, indicating less appreciation of symptoms in those with a long asthma duration. Interviews revealed this was related to previous asthma management strategies when treatment options were limited. Participants with a recent diagnosis sought understanding of asthma and the reason for their illness. Initiatives to improve asthma care in older people need to reflect these findings. Conclusions: Self‐management strategies for older people need to be tailored according to the time of disease onset and the duration of disease. Please cite this paper as: Goeman DP, O’Hehir RE, Jenkins C, Scharf SL and Douglass JA. ‘You have to learn to live with it’: a qualitative and quantitative study of older people with asthma. The Clinical Respiratory Journal 2007; 1:99–105. 相似文献