全文获取类型
收费全文 | 5431篇 |
免费 | 315篇 |
国内免费 | 7篇 |
专业分类
耳鼻咽喉 | 50篇 |
儿科学 | 231篇 |
妇产科学 | 142篇 |
基础医学 | 627篇 |
口腔科学 | 214篇 |
临床医学 | 845篇 |
内科学 | 939篇 |
皮肤病学 | 198篇 |
神经病学 | 514篇 |
特种医学 | 102篇 |
外科学 | 412篇 |
综合类 | 61篇 |
一般理论 | 4篇 |
预防医学 | 734篇 |
眼科学 | 65篇 |
药学 | 275篇 |
中国医学 | 10篇 |
肿瘤学 | 330篇 |
出版年
2023年 | 19篇 |
2022年 | 58篇 |
2021年 | 82篇 |
2020年 | 84篇 |
2019年 | 92篇 |
2018年 | 140篇 |
2017年 | 101篇 |
2016年 | 124篇 |
2015年 | 112篇 |
2014年 | 179篇 |
2013年 | 251篇 |
2012年 | 383篇 |
2011年 | 451篇 |
2010年 | 241篇 |
2009年 | 184篇 |
2008年 | 358篇 |
2007年 | 428篇 |
2006年 | 390篇 |
2005年 | 356篇 |
2004年 | 336篇 |
2003年 | 290篇 |
2002年 | 284篇 |
2001年 | 47篇 |
2000年 | 34篇 |
1999年 | 54篇 |
1998年 | 61篇 |
1997年 | 58篇 |
1996年 | 35篇 |
1995年 | 27篇 |
1994年 | 35篇 |
1993年 | 41篇 |
1992年 | 26篇 |
1991年 | 23篇 |
1990年 | 21篇 |
1989年 | 18篇 |
1988年 | 23篇 |
1987年 | 24篇 |
1986年 | 23篇 |
1985年 | 22篇 |
1984年 | 26篇 |
1983年 | 27篇 |
1982年 | 31篇 |
1981年 | 24篇 |
1980年 | 14篇 |
1979年 | 14篇 |
1978年 | 14篇 |
1977年 | 13篇 |
1976年 | 12篇 |
1975年 | 11篇 |
1974年 | 8篇 |
排序方式: 共有5753条查询结果,搜索用时 0 毫秒
1.
Marcia Finlayson 《The American journal of occupational therapy》2004,58(1):54-63
Multiple sclerosis (MS) is a chronic, progressive neurological disease that causes demyelination of the central nervous system. Typically diagnosed in adulthood, it does not significantly reduce life expectancy. The goal of this exploratory study was to describe the health-related concerns and service needs of 27 older adults with MS, ages 55 to 81 years. Through in-depth interviews using a phenomenological approach, fear of the future was found to be a predominant concern among the participants. Within this fear, participants expressed particular concerns about experiencing further losses of mobility and independence, becoming a burden on caregivers, and having to move to a nursing home. The findings raise three major challenges for occupational therapists that include: (1) developing or modifying interventions that can enable older adults with MS to gain a sense of control over their future, (2) working with families affected by MS together with other disciplines such as psychology and social work, and (3) advocating for more and better community support options for persons with MS. 相似文献
2.
The number of left ventricular assist device (LVAD) implantations is growing as a result of increased waiting periods for cardiac transplantation and the decreased availability of organ donors. Furthermore, the Food and Drug Administration (FDA) has approved permanent LVAD support. After an acute hospitalization, patients with LVADs may need prolonged convalescence in a healthcare facility because they have complex medical needs and are physically disabled. Admission criteria need to be developed as essential patient and nursing competencies need to be defined as a part of a successful LVAD program in an acute rehabilitation center. Acute rehabilitation centers can help patients with LVADs transition to a home setting. 相似文献
3.
Marcia W. Swanson P.T. Forrest C. Bennett M.D. Kirkwood K. Shy M.D. Michael F. Whitfield M.D. 《Developmental medicine and child neurology》1992,34(4):321-337
The predictive validity of infant neuromotor evaluation by the Movement Assessment of Infants (MAI) was investigated in low-birthweight infants. Motor performance at four and eight months was examined in relation to neurodevelopmental outcome at 18 months of age. Correlations were equally strong between total MAI risk scores at four and eight months and performance on the Bayley Scales. Muscle tone observations were more discriminating at four months, and automatic reactions and volitional movement were most predictive at eight months. The MAI was highly sensitive to neurodevelopmental abnormality at four and eight months and more sensitive than the Bayley Motor Scale; both assessment tools had lower specificity at eight months. The high false-positive rate is attributed to transient neuromotor abnormalities and immaturity of motor function in low-birthweight infants with normal outcome. 相似文献
4.
The authors emphasize the orderly sequence of events (consonance) characteristic of normal puberty. Loss of consonance of normal puberty indicates an underlying endocrine disorder. 相似文献
5.
Brian F O'Donnell Marcia A Wilt Ann Marie Hake Julie C Stout Sandra C Kirkwood Tatiana Foroud 《Movement disorders》2003,18(9):1027-1034
Disturbances of visual cognition, visuomotor performance, and visual memory have been described frequently in Huntington's disease (HD). Early stage visual abnormalities could contribute to these deficits. We evaluated visual processing in 20 control subjects who were non-gene carriers at risk for HD, nine presymptomatic gene-positive subjects, and eight subjects with a recent diagnosis of Huntington's disease. Visual perceptual tests of contrast sensitivity and motion discrimination were used to probe early stage visual processing. Extraocular movements were evaluated in a neurologic examination, and the Digit Symbol test was used to test visual motor performance. Contrast sensitivity did not differ among the three groups. Motion discrimination was impaired in HD subjects but not in the presymptomatic gene carriers when compared to gene noncarriers. Among gene carriers, impaired motion discrimination performance was associated with poorer Digit Symbol performance and extraocular abnormalities. These findings suggest that the early stages of HD are associated with disturbances of motion perception as well as disruptions of visual motor and ocular motor performance. 相似文献
6.
Effect of two preventive programs on oral health knowledge and habits among Brazilian schoolchildren
Yvonne A. P. Buischi Per Axelsson Luciene B. Oliveira Marcia P. A. Mayer Per Gjermo 《Community dentistry and oral epidemiology》1994,22(1):41-46
Abstract – The effect upon dental health knowledge and dental health behavior of a comprehensive and a less comprehensive preventive program was compared in a 3-yr follow up study. The comprehensive program included active participation of the students and parental involvement. The study group consisted of 186 Brazilian schoolchildren 13 yr of age at the start of the program. A reference group from another school of similar socioeconomic level was included in the analyses. The data were collected from questionnaires filled in by the children under surveillance after the completion of the program. Significant differences in knowledge as well as in reported behavior were observed. The children enrolled in the comprehensive program in general scored higher in dental health knowledge than did those in the less comprehensive program. However, the latter group of children seemed to have acquired more correct knowledge during the period than had the control and reference children. Similar results were obtained concerning reported dental health behavior. 相似文献
7.
The clinical and endocrinological findings in 24 children with septo-optic dysplasia and/or agenesis of the corpus callosum are described with particular reference to posterior pituitary function. Nine had diabetes insipidus. The prevalence of diabetes insipidus was similar in children with complete and incomplete forms of septo-optic dysplasia. Maintenance of normal osmotic balance was very difficult in six of these children, even after the introduction of treatment with vasopressin, either as desmopressin, or lysine vasopressin spray in one of the early cases. 相似文献
8.
The density of Mg(2+)-dependent Ca2+ ATPase in the terminal cisternae of pig skeletal muscle fibers was investigated to discover whether a reduction in Ca2+ ATPase content impairs Ca2+ sequestration and contributes to the elevated myoplasmic Ca2+ concentration in malignant hyperthermia. Unexpectedly, immunogold electron microscopy showed an increase in Ca2+ ATPase, while densitometry of SDS-polyacrylamide gels suggested that the Ca2+ ATPase content of terminal cisternae vesicles did not change. The affinity of Ca2+ ATPase in vesicles for our monoclonal antibody was not altered. We suggest that the availability of antigenic sites in malignant hyperthermia increases after processing for electron microscopy, perhaps as a consequence of altered sarcoplasmic reticulum membrane properties. 相似文献
9.
10.