全文获取类型
收费全文 | 2069篇 |
免费 | 98篇 |
国内免费 | 39篇 |
专业分类
耳鼻咽喉 | 47篇 |
儿科学 | 61篇 |
妇产科学 | 42篇 |
基础医学 | 126篇 |
口腔科学 | 46篇 |
临床医学 | 570篇 |
内科学 | 311篇 |
皮肤病学 | 69篇 |
神经病学 | 276篇 |
特种医学 | 140篇 |
外科学 | 130篇 |
综合类 | 52篇 |
预防医学 | 103篇 |
眼科学 | 31篇 |
药学 | 63篇 |
肿瘤学 | 139篇 |
出版年
2023年 | 8篇 |
2021年 | 18篇 |
2020年 | 7篇 |
2019年 | 16篇 |
2018年 | 19篇 |
2017年 | 17篇 |
2016年 | 20篇 |
2015年 | 31篇 |
2014年 | 34篇 |
2013年 | 73篇 |
2012年 | 59篇 |
2011年 | 39篇 |
2010年 | 49篇 |
2009年 | 52篇 |
2008年 | 61篇 |
2007年 | 66篇 |
2006年 | 59篇 |
2005年 | 46篇 |
2004年 | 53篇 |
2003年 | 52篇 |
2002年 | 52篇 |
2001年 | 65篇 |
2000年 | 56篇 |
1999年 | 69篇 |
1998年 | 105篇 |
1997年 | 95篇 |
1996年 | 87篇 |
1995年 | 73篇 |
1994年 | 53篇 |
1993年 | 63篇 |
1992年 | 53篇 |
1991年 | 52篇 |
1990年 | 55篇 |
1989年 | 62篇 |
1988年 | 65篇 |
1987年 | 39篇 |
1986年 | 51篇 |
1985年 | 42篇 |
1984年 | 28篇 |
1983年 | 26篇 |
1982年 | 12篇 |
1981年 | 11篇 |
1980年 | 8篇 |
1979年 | 19篇 |
1978年 | 9篇 |
1975年 | 11篇 |
1974年 | 12篇 |
1973年 | 7篇 |
1971年 | 6篇 |
1970年 | 8篇 |
排序方式: 共有2206条查询结果,搜索用时 19 毫秒
1.
2.
3.
Scopolamine (SCOP) (3.0 mu/kg and 6.0 micrograms/kg) and saline were administered intramuscularly at 11:00 PM to eight normal male volunteers in a randomized design, and the effects on the sleep electroencephalogram (EEG) and nocturnal cortisol secretion (via blood sampling every 15 min) were evaluated. Compared to saline, SCOP produced a significant dose-related delay in rapid eye movement (REM) latency. In contrast, neither dose of SCOP significantly affected nocturnal plasma cortisol concentrations. These results suggest that the central cholinergic system that regulates the onset of REM sleep is more sensitive to dysregulation than the cholinergic system that controls the degree of nocturnal cortisol secretion. If central cholinergic overactivity is responsible for both the REM sleep latency and cortisol abnormalities in depressed patients, then our findings with SCOP might help explain why the incidences of these abnormalities are different. 相似文献
4.
J A Gottridge B R Meyer N S Schwartz R S Lesser 《Archives of internal medicine》1989,149(7):1660-1662
To determine the value of chest roentgenograms in the management of asymptomatic persons with positive tuberculin skin test results, we undertook a retrospective review of all tests administered by our Employee Health Service, North Shore University Hospital, Manhasset, NY, between July 1, 1983 and November 1, 1987. Of 5200 tests, 247 results were positive. Two hundred twenty-one of these charts were reviewed for roentgenographic results and the presence of symptoms. All persons were asymptomatic. Chest roentgenograms revealed the following: normal, 188; unrelated abnormalities, 24; apical pleural thickening, 5; granulomas, 2; calcified hilar node, 1; and calcified node plus granuloma, 1. We noted no active tuberculosis, nor did the chest roentgenographic results influence recommendations for isoniazid prophylaxis. We conclude that chest roentgenograms are of value in 0% to 1.3% of asymptomatic people with positive tuberculin test results. A larger study should be undertaken to further define the usefulness of chest roentgenograms in this population. 相似文献
5.
6.
Gina Kearney MSN RN CS AHN-BC JeMe Cioppa-Mosca PT MBA Margaret G. E. Peterson Ph.D C. Ronald MacKenzie MD 《HSS journal》2007,3(2):198-201
In an outpatient rehabilitation setting, both patients’ use and therapists’ knowledge of complementary and alternative medicine
(CAM) varies widely. Based on this observation and a recognition of CAM as an emerging practice area for rehabilitation professionals,
it was felt that a thorough and consistent approach to the education and orientation of physical therapists to the world of
CAM and integrative care was needed. This special interest paper will describe one center’s approach, development, and use
of a unique and comprehensive training manual designed to provide both a structured and standardized approach for educating
physical therapists about CAM and related therapeutic modalities. This innovative teaching tool allows for multiple methods
of content delivery within a multidisciplinary format and can be used for those who practice currently or desire to practice
in an integrative care environment. 相似文献
7.
Janna Lesser Deborah Koniak-Griffin Evelyn Gonzalez-Figueroa Rong Huang William G Cumberland 《The Journal of the Association of Nurses in AIDS Care》2007,18(2):18-27
Pregnant and parenting adolescents living in inner cities are at risk for acquiring HIV through unprotected sexual activity. In addition to individual risk behaviors, a lack of socioeconomic and other environmental resources create risk environments that make certain communities vulnerable to both adolescent pregnancy and HIV/AIDS. Research indicates that adolescent parents, many who have histories of childhood trauma, may use their experience of young parenthood and the concomitant feelings of parental protectiveness as a source of renewed hope for their future. The purpose of this report is to explore the relationship between history of childhood abuse and high risk behaviors in adolescent Latino mothers and fathers enrolled in a randomized clinical trial of a culturally rooted, couple-focused HIV prevention program. In addition, this report describes the HIV prevention program that was designed specifically for young Latino parents wherein maternal and paternal protectiveness are viewed as intrinsic and developing critical factors that promote resiliency and motivate behavioral change. 相似文献
8.
INTESTINAL OBSTRUCTION DUE TO A GALLSTONE 总被引:1,自引:0,他引:1
9.
10.
J. Randolph Swartz Ira M. Lesser Kyle B. Boone Bruce L. Miller Ismael Mena 《International journal of geriatric psychiatry》1995,10(6):437-446
Global and regional cerebral blood flow (CBF) were evaluated with single photon emission computerized tomography (SPECT) utilizing both 133Xenon (133Xe) (47 subjects, 47–82 years old) and 99Tc-hexamethylpropyleneamine oxime (99Tc-HMPAO) (27 subjects, 47–80 years old). The 133Xe results showed: among total subjects, no age-related decline in global CBF, but a significant regional decline in the occipital lobe (p < 0.05); among men, significant age-related declines in global, frontal, temporal, occipital and right hemisphere CBF (all p < 0.05); among women, no age-related decline in global or regional CBF. The 99Tc-HMPAO results showed no age-related decline in either global or regional perfusion among total subjects, men or women. These results suggest that age-related global and regional (including frontal lobe) CBF declines do not occur in healthy control subjects after the age of 45 years. However, gender differences in age-related CBF changes warrant further study. 相似文献