全文获取类型
收费全文 | 99022篇 |
免费 | 9497篇 |
国内免费 | 764篇 |
专业分类
耳鼻咽喉 | 281篇 |
儿科学 | 2060篇 |
妇产科学 | 1738篇 |
基础医学 | 5718篇 |
口腔科学 | 4478篇 |
临床医学 | 18033篇 |
内科学 | 7925篇 |
皮肤病学 | 670篇 |
神经病学 | 5380篇 |
特种医学 | 1249篇 |
外科学 | 3675篇 |
综合类 | 10642篇 |
现状与发展 | 4篇 |
一般理论 | 92篇 |
预防医学 | 39875篇 |
眼科学 | 369篇 |
药学 | 3928篇 |
107篇 | |
中国医学 | 1009篇 |
肿瘤学 | 2050篇 |
出版年
2024年 | 372篇 |
2023年 | 2895篇 |
2022年 | 3780篇 |
2021年 | 5279篇 |
2020年 | 5489篇 |
2019年 | 5171篇 |
2018年 | 4457篇 |
2017年 | 4376篇 |
2016年 | 4217篇 |
2015年 | 4092篇 |
2014年 | 6645篇 |
2013年 | 8666篇 |
2012年 | 5980篇 |
2011年 | 6313篇 |
2010年 | 4757篇 |
2009年 | 4766篇 |
2008年 | 4707篇 |
2007年 | 4685篇 |
2006年 | 4020篇 |
2005年 | 3099篇 |
2004年 | 2672篇 |
2003年 | 2335篇 |
2002年 | 1689篇 |
2001年 | 1590篇 |
2000年 | 1381篇 |
1999年 | 942篇 |
1998年 | 801篇 |
1997年 | 645篇 |
1996年 | 543篇 |
1995年 | 354篇 |
1994年 | 352篇 |
1993年 | 338篇 |
1992年 | 267篇 |
1991年 | 228篇 |
1990年 | 192篇 |
1989年 | 155篇 |
1988年 | 183篇 |
1987年 | 123篇 |
1986年 | 104篇 |
1985年 | 113篇 |
1984年 | 84篇 |
1983年 | 55篇 |
1982年 | 48篇 |
1981年 | 53篇 |
1980年 | 50篇 |
1979年 | 36篇 |
1978年 | 39篇 |
1977年 | 38篇 |
1976年 | 37篇 |
1975年 | 35篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
Guk-Hee SUH 《Psychogeriatrics》2006,6(1):10-18
Background: Multiple factors related to specific dimensions of health – general, physical and mental – contribute to mortality in the elderly, but their relative contributions to mortality risk is not well‐known. The objectives of this prospective population‐based cohort study were to measure mortality rates and to identify predictors of mortality in community‐dwelling men and women aged 65 years or older in Korea by examining self assessments of general health, objective medical burden, and measurement of cognition, mood and function. Methods: A total of 1245 elderly (529 men; 716 women) were followed up longitudinally for 3.5 years. Fixed predictor variables observed at baseline examined in Cox proportional hazards models were age, sex, education, chronic medical illnesses, self‐rated health, basic activities of daily living, depression measured by the Geriatric Depression Scale, and cognition measured by the Mini‐Mental State Examination. Results: Mortality rates were similar to those of the 2001 Korean population. Older age, male sex, poor self‐rated health and presence of cerebrovascular disease were significant predictors of mortality. Presence of ischemic heart disease and cerebrovascular disease at baseline predicted mortality in men, but not in women. Depression predicted mortality only when chronic medical illnesses were excluded from the model. Conclusions: Subjective self‐rated health and objective medical burden are strong independent predictors of mortality in this elderly community population, in addition to age and sex. 相似文献
72.
A marked proportion of primary care patients have mental disorders and problems that remain unrecognized by the patients and their general practitioners. There is furthermore a great variation in the physicians’ ability to detect mental disorders. The aim of the present study was to find out the overall prevalence of mental disorders among patients receiving primary health care. The material consisted of 1000 randomly selected adult patients attending primary care facilities in Turku. The mental disorders were assessed by using the Symptom Checklist (SCL-25) and by general practitioners. According to the SCL-25, one fourth of the sample had a mental disorder. Only two fifths of them could be identified by the general practitioners. 相似文献
73.
Public health research is divided into factions which are oftenengaged in bitter theoretical and methodological disputes, especiallywhen issues of funding are discussed. From the perspective ofa user of health services, these rivalries are an obstacle topublic health. This paper explores three approaches to understandingthe foundations of these differences. The first is a discussionof disciplinary sub-cultures, the second a brief discussionof a philosophy of knowledge and the third a social perspectiveon paradigms. The unifying theme is the idea of disciplinarysub-cultures. 相似文献
74.
Taco Pilot 《Journal of clinical periodontology》1986,13(10):889-893
Abstract Economic factors in diagnosis and treatment planning in periodontology may be considered from several points of view. A first perspective is that of government responsibility. Because of the explosion in health care expenditure in the last decade, public funding of dental care programmes may become static or even reduced. Most governments try to curb the ever growing public health expenditure. Consequently, terms like effectiveness, efficiency and accountability are now becoming common words also in relation to periodontal health care. Moreover, private insurance companies, which have entered this area, may be individual patient who, explicitly or implicitly, would like to consider the services individual patient, who explicitly or implicitly, would like to consider the sendees rendered in periodontal therapy and prevention as cost-effective. Features of supply of and demand for care on an individual basis should also be considered. Finally, the periodontist or general practitioner has to consider economic factors. In professional life, there should be a balance between good working conditions providing satisfactory care, and the demands and priorities of individual patients and the community at large. 相似文献
75.
A total of 196 intern medical officers who had graduated from the four medical schools in Sri Lanka in 1984 indicated their attitudes towards anaesthesia as a medical specialty in response to a postal questionnaire. Eighty per cent of the graduates considered anaesthesia to be an established specialty in Sri Lanka, while 17% felt that the specialty had limited clinical application. A total of 62% of the graduates were not aware, prior to their entry to medical school, that anaesthesia was related to medical practice. All the graduates indicated that the intra-operative role of the anaesthetist was on a par with that of the surgeon, but 40% felt that the pre- and post-operative roles were of a secondary nature. Overall, 42% considered that an anaesthetist acts as an assistant to the surgeon. The graduates were of the opinion that only 35% of the patients undergoing surgery were appreciative of the services rendered by an anaesthetist. Fifty per cent of the graduates considered exposure to the specialty in the undergraduate curriculum as inadequate. Anaesthesia was chosen as the first career preference by 1.5%. The dominant reasons for not selecting anaesthesia as a career specialty were: minimal patient contact and patient recognition (62%), and lack of recognition of the specialty by society (54%). Anaesthetists in Sri Lanka are challenged to alter the perceptions associated with the specialty, which are probably a result of chronic staff shortages restricting practice to the confines of operating theatres. 相似文献
76.
D W Bowden K Lohman F-C Hsu C D Langefeld J J Carr L Lenchik L E Wagenknecht B I Freedman D M Herrington 《Diabetic medicine》2006,23(7):763-767
AIMS: Increased levels of inflammatory biomarkers, especially C-reactive protein (CRP), are associated with increased risk for cardiovascular disease (CVD) events, such as myocardial infarction, stroke, peripheral vascular disease, and sudden cardiac death. Medical interventions that increase CRP levels, such as hormone replacement therapy (HRT) in post-menopausal women, are under increasing scrutiny. The effect of HRT on CRP levels in women with Type 2 diabetes (T2DM) is not well documented, and conflicting conclusions have been reported. The aim of this study was to determine the influence of HRT on women with diabetes in a large cross-sectional study. METHODS: Three hundred and twenty-seven post-menopausal women with T2DM from the Diabetes Heart Study participated. Current use of HRT was determined and serum CRP levels were measured using a high-sensitivity ELISA kit. Generalized estimating equation methods were used to assess the relationship of multiple clinical and lifestyle (e.g. smoking) measures on CRP levels including differences between women taking HRT (HRT+) and not taking HRT (HRT-). RESULTS: Overall serum CRP levels were strongly associated with body mass index (P < 0.0001) and age (P < 0.0001). Of the women, 243 were not using HRT and 84 were using HRT. HRT+ and HRT- women did not differ significantly in measures of clinical traits, with the exception of higher mean low-density lipoprotein cholesterol in HRT- women (P = 0.004). In all models tested, HRT+ women had significantly higher circulating CRP levels, with P-values ranging from 0.0045 to 0.010. CONCLUSIONS: In this study of serum CRP concentration as a function of HRT in women with Type 2 diabetes, there was consistent evidence for increased circulating CRP levels in women receiving oestrogen-containing HRT. Whether HRT-induced increases in CRP can account for the adverse cardiovascular effects of HRT remains to be established; however, based on these data, there is little reason to believe that diabetic women would be spared from such an effect. 相似文献
77.
This study presents a first assessment of the challenges faced by Dutch health care providers dealing with the increasing cultural diversity in Dutch society. Qualitative interviews with 24 Dutch caregivers and policy-makers point to a number of important difficulties encountered when confronted with the growing diversity of patient populations. The study focuses explicitly on the challenges health care providers perceive in their direct interactions with patients. On the basis of the observations of the 24 respondents five strategies were formulated to improve the delivery of care in a multicultural environment. Their findings were further evaluated by confronting the empirical data with care-ethical notions (attentiveness, responsibility, competence, and responsiveness) and intercultural communication-theory. 相似文献
78.
Health Promotion as a professional practice is facing its thirdmajor challenge this century. To the infectious diseases ofthe past and the lifestyle risks of the present have been addedthe global environmental hazards of the future. Each wave of health risk has three things in common. The firstis that ill-health results from a change in the relationshipbetween the environment and society. The second is that theill-health so caused falls predominantly on already disadvantagedgroups in the community. Third in each case there is a tunelag of two or more decades between recognition of the freshrisks to health and effective professional response. The challengetoday is to shorten the lead time for responding to the thirdphase, the degradation of the global environment. This willgive a radical reorientation to the field of health promotion,which has traditionally safe guarded the health of people fromenvironmental change, not vice versa. The reorientation of health promotion is discussed in termsof the contributions which health promotion can make to environmentalmanagement. The options for managing environmental change areidentified as protection, prevention, resilience and adaptation.These strategies are already in use in the different branchesof health promotion. 相似文献
79.
It is well known that prevalence and incidence rates of cardiovasculardisease (CVD) and CVD risk factors are not equally distributedamong socioeconomic groups. Known risk factors account for part,but not all of unequally distributed CVD rates. Socioeconomicconditions and psychosocial dynamics may explain another pareof the increased CVD rates. Theoretically, it may be possibleto lower CVD rates and CVD risk factor prevalence among lowersocioeconomic status (SES) groups by using a community development(socio-environment) strategy directed towards changes in socioenvrronmentalrisk conditions and psychosocial risk factors, rather than CVDrisk factors per Se. This article describes a protocol for sucha strategy based upon the planning work of Canadian health professionals,loosely organized under a project titled Heart HealthInequalities in Canada This protocol incorporates baselinedata on CVD and CVD risk factor prevalence, but is premisedon actions negotiated between community organizations and healthauthorities, rather than defined unilaterally by health authorities.As such, program design activities and evaluation will differfrom a more general population-based risk factor reduction strategy. 相似文献
80.
This study, which was carried out as part of the TURVA project on psychosocial adaptation in old age, is concerned with the significance of social support to people approaching retirement age. The population consisted of 200 urban dwellers and 189 rural dwellers, who were studied at the age of 62. The subjects were either about to retire in the near future or had already retired, and it was assumed that this event causes a certain amount of stress, which may lead to mental disturbance regardless of the amount of social support available to the individual. Intimate relationship and close friendship served as the measures of social support. Mental disturbances were assessed on the basis of the General Health Questionnaire (36-item version) and the number of psychic and especially depressive symptoms. The prevalence of mental disturbance and depressive symptoms was lowest in those people who lived in a close marital relationship and who also described their spouse as empathic. Psychic symptoms were most common in those people who said their relationship to their spouse was distant and who described them as unempathic. The subjects who were not married fell in-between these 2 groups regardless of whether they had an intimate relationship with someone of the opposite sex. A positive marital relationship seemed to provide a shield against depression, while a negative marital relationship tended to make the individual more vulnerable to depression. The role of a close non-marital friendship depended on the respondent's sex. In women, it was associated with a high prevalence of depressive symptoms.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献