全文获取类型
收费全文 | 55579篇 |
免费 | 3468篇 |
国内免费 | 110篇 |
专业分类
耳鼻咽喉 | 529篇 |
儿科学 | 2296篇 |
妇产科学 | 1514篇 |
基础医学 | 6946篇 |
口腔科学 | 539篇 |
临床医学 | 8544篇 |
内科学 | 9519篇 |
皮肤病学 | 756篇 |
神经病学 | 5329篇 |
特种医学 | 974篇 |
外科学 | 4603篇 |
综合类 | 589篇 |
一般理论 | 109篇 |
预防医学 | 7764篇 |
眼科学 | 760篇 |
药学 | 3632篇 |
中国医学 | 61篇 |
肿瘤学 | 4693篇 |
出版年
2023年 | 290篇 |
2022年 | 431篇 |
2021年 | 1016篇 |
2020年 | 693篇 |
2019年 | 1050篇 |
2018年 | 1202篇 |
2017年 | 977篇 |
2016年 | 1058篇 |
2015年 | 1237篇 |
2014年 | 1711篇 |
2013年 | 2728篇 |
2012年 | 3929篇 |
2011年 | 4240篇 |
2010年 | 2356篇 |
2009年 | 2127篇 |
2008年 | 3831篇 |
2007年 | 4075篇 |
2006年 | 3927篇 |
2005年 | 4068篇 |
2004年 | 3863篇 |
2003年 | 3636篇 |
2002年 | 3352篇 |
2001年 | 469篇 |
2000年 | 343篇 |
1999年 | 470篇 |
1998年 | 685篇 |
1997年 | 608篇 |
1996年 | 479篇 |
1995年 | 481篇 |
1994年 | 425篇 |
1993年 | 338篇 |
1992年 | 243篇 |
1991年 | 207篇 |
1990年 | 185篇 |
1989年 | 196篇 |
1988年 | 185篇 |
1987年 | 169篇 |
1986年 | 162篇 |
1985年 | 163篇 |
1984年 | 186篇 |
1983年 | 169篇 |
1982年 | 215篇 |
1981年 | 207篇 |
1980年 | 155篇 |
1979年 | 94篇 |
1978年 | 112篇 |
1977年 | 52篇 |
1976年 | 57篇 |
1975年 | 45篇 |
1974年 | 68篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
Pressure ulcers are a high-risk, high-volume, and high-cost problem for persons with disabilities. This article describes four tools published in the literature and reports the validity, reliability, strengths, and limitations of each. These tools include the Pressure Ulcer Scale for Healing (PUSH), the Pressure Sore Status Tool (PSST), the Sussman Wound Healing Tool (SWHT), and the Sessing Scale. Rehabilitation nurses should use a consistent framework with accurate quantification to assess, document, and monitor changes in pressure ulcers over time. Such a measurement tool must prove valid for the disabled population in which the tool is used. This will enable healthcare providers to communicate more effectively and evaluate the therapeutic plan of care. 相似文献
42.
Susan B Fowler Michael Moussouttas Barbara Mancini 《The Journal of neuroscience nursing》2005,37(4):220-223
Metabolic syndrome is associated with increased risk for cardiovascular and cerebrovascular disease. The World Health Organization and National Cholesterol Education Program Adult Treatment Panel III have identified physiologic abnormalities associated with metabolic syndrome, including impaired glucose metabolism, high blood pressure, elevated cholesterol levels, and abdominal obesity. It is estimated that 47 million Americans have metabolic syndrome. A variety of therapies may help reduce the incidence and risk, including diet, weight loss, physical exercise, glycemic control, and pharmacological treatments. Nursing care is focused on developing an individualized plan of care that includes family members and providing education, psychosocial support, close monitoring, and continued follow-up to ensure adherence and success in achieving patient outcomes. 相似文献
43.
44.
45.
Betsy D. Kennard Susan G. Silva Simon Tonev Paul Rohde Jennifer L. Hughes Benedetto Vitiello Christopher J. Kratochvil John F. Curry Graham J. Emslie Mark Reinecke John March 《Journal of the American Academy of Child and Adolescent Psychiatry》2009,48(2):186-195
ObjectiveWe examine remission rate probabilities, recovery rates, and residual symptoms across 36 weeks in the Treatment for Adolescents with Depression Study (TADS).MethodThe TADS, a multisite clinical trial, randomized 439 adolescents with major depressive disorder to 12 weeks of treatment with fluoxetine, cognitive–behavioral therapy, their combination, or pill placebo. The pill placebo group, treated openly after week 12, was not included in the subsequent analyses. Treatment differences in remission rates and probabilities of remission over time are compared. Recovery rates in remitters at weeks 12 (acute phase remitters) and 18 (continuation phase remitters) are summarized. We also examined whether residual symptoms at the end of 12 weeks of acute treatment predicted later remission.ResultsAt week 36, the estimated remission rates for intention-to-treat cases were as follows: combination, 60%; fluoxetine, 55%; cognitive–behavioral therapy, 64%; and overall, 60%. Paired comparisons reveal that, at week 24, all active treatments converge on remission outcomes. The recovery rate at week 36 was 65% for acute phase remitters and 71% for continuation phase remitters, with no significant between-treatment differences in recovery rates. Residual symptoms at the end of acute treatment predicted failure to achieve remission at weeks 18 and 36.ConclusionsMost depressed adolescents in all three treatment modalities achieved remission at the end of 9 months of treatment. 相似文献
46.
47.
Emmanuel J Favaloro Roslyn Bonar Elizabeth Duncan Susan Rodgers Katherine Marsden 《Blood coagulation & fibrinolysis》2007,18(5):441-448
The PFA-100 is a relatively new laboratory instrument, first described in 1995. There have since been numerous studies assessing its utility as a screening tool for platelet dysfunction and/or von Willebrand's disease (VWD). The PFA-100 displays variable sensitivity to different types of platelet disorders, as well as to antiplatelet medication (e.g. aspirin), with similar caveats for monitoring of primary haemostasis-promoting therapies in platelet dysfunction. There is therefore considerable uncertainty regarding its utility within this context, and we have accordingly performed an audit of usage among participants of the Royal College of Pathologists of Australasia Quality Assurance Program. Of 105 laboratories surveyed, 40 responded that they performed platelet function testing, with 26 (65%) further indicating they utilized the PFA-100. We report a wide variety of laboratory usage among these users, including numbers of tests performed [annual median (range) = 270 (15-6000)], sources of requests (clinical sources and localities), testing criteria and follow-up action. Most tests were completed within 4 h of collection, as recommended by the manufacturer, and most tests were performed as a replacement, or as a preliminary screen of platelet function (i.e. classical aggregation). Most abnormal findings, however, were attributed to antiplatelet medication such as aspirin. 相似文献
48.
49.
50.
BACKGROUND: Patients with multi-handicaps present clinical challenges and are underserved. Central nervous system dysfunction and ocular disorders with this population are prevalent and well-documented. However, vision care outcomes data are limited and specific visual function recommendations to caregivers are rarely cited. METHODS: The charts of 110 multiply handicapped adults residing in 22 group homes in Wayne County. Michigan were retrospectively studied to identify ocular profiles and predictors of visual function. RESULTS: Sixty-five percent of the subjects were male and 80% were ages 26 to 55 years. There was no expressive language in 41%, and 37% were non-ambulatory. The median visual impairment level was moderate in both eyes (based on WHO). Significant associations between visual impairment level and subpopulations (such as seizure disorder, mental retardation without specific etiology, cerebral palsy, and Down syndrome) were identified. Successful spectacle wear statistically increased with higher refractive errors. Associations between cataract, nystagmus, and strabismus with particular subpopulations were significant (all P values < 0.0182). CONCLUSIONS: Clinicians who evaluate patients with multi-handicaps have few known predictors of treatment success. This study indicates that useful predictors of visual function can be made from refractive error, systemic conditions, and ocular diagnoses. No significant relationship was found with cognitive level and either vision impairment or spectacle use. The authors attribute successful implementation of recommendations to communication with group home caregivers. 相似文献