全文获取类型
收费全文 | 1865篇 |
免费 | 140篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 9篇 |
儿科学 | 78篇 |
妇产科学 | 33篇 |
基础医学 | 241篇 |
口腔科学 | 22篇 |
临床医学 | 124篇 |
内科学 | 335篇 |
皮肤病学 | 53篇 |
神经病学 | 58篇 |
特种医学 | 104篇 |
外科学 | 213篇 |
综合类 | 296篇 |
一般理论 | 1篇 |
预防医学 | 156篇 |
眼科学 | 71篇 |
药学 | 85篇 |
1篇 | |
中国医学 | 6篇 |
肿瘤学 | 123篇 |
出版年
2023年 | 12篇 |
2022年 | 36篇 |
2021年 | 54篇 |
2020年 | 27篇 |
2019年 | 35篇 |
2018年 | 51篇 |
2017年 | 21篇 |
2016年 | 29篇 |
2015年 | 45篇 |
2014年 | 71篇 |
2013年 | 69篇 |
2012年 | 86篇 |
2011年 | 91篇 |
2010年 | 118篇 |
2009年 | 86篇 |
2008年 | 103篇 |
2007年 | 88篇 |
2006年 | 91篇 |
2005年 | 78篇 |
2004年 | 88篇 |
2003年 | 60篇 |
2002年 | 65篇 |
2001年 | 53篇 |
2000年 | 38篇 |
1999年 | 42篇 |
1998年 | 32篇 |
1997年 | 42篇 |
1996年 | 38篇 |
1995年 | 31篇 |
1994年 | 27篇 |
1993年 | 17篇 |
1992年 | 26篇 |
1991年 | 11篇 |
1990年 | 18篇 |
1989年 | 20篇 |
1988年 | 16篇 |
1987年 | 20篇 |
1986年 | 13篇 |
1985年 | 15篇 |
1984年 | 10篇 |
1982年 | 10篇 |
1981年 | 10篇 |
1980年 | 9篇 |
1979年 | 10篇 |
1978年 | 10篇 |
1977年 | 15篇 |
1976年 | 9篇 |
1975年 | 7篇 |
1973年 | 9篇 |
1970年 | 7篇 |
排序方式: 共有2009条查询结果,搜索用时 15 毫秒
1.
MUAMMER SEYHAN BAAK KANDI COKUN HÜLYA SALAM HAMDI ÖZCAN YELDA KARINCAOLU 《Pediatrics international》2006,48(6):525-530
BACKGROUND: The present study was aimed to define the gender ratio, familial occurrence, age of onset, precipitating factors, clinical types, nail and joint involvement of psoriasis in childhood and adolescence in Turkey. METHODS: A total of 61 children with psoriasis under 18 years old were evaluated retrospectively, for age, gender, age of disease onset, family history, concomitant disease, the clinical type of psoriasis, clinical localization, nail and joint involvement and treatment modalities. RESULTS: Of the patients, 23 (37.70%) were boys and 38 (62.30%) were girls. Mean age was 9.28 +/- 4.02 years in girls and 11.18 +/- 3.85 years in boys (9.96 +/- 4.03 years in all children). Mean age at the onset of the disease was 6.81 +/- 4.11 years in girls and 7.03 +/- 4.28 years in boys (6.89 +/- 4.14 years in all patients). In 14 (23%) cases, a positive family history was detected. The most frequent probable triggering factors were upper respiratory tract infections (14.8%) and positive throat culture for A group ss-hemolytic streptococcus (21.3%). Frequency of emotional stress and psychiatric morbidity were 54% and 9.8%, respectively. The most frequent localizations at onset were trunk (44.3%), extremities (54.0%), and scalp (36.0%). Three children (4.9%) had a history of dissemination from psoriatic diaper rash. In total, 51 (83.6%) patients presented with psoriasis vulgaris, eight (13.1%) with generalized pustular psoriasis, and the remaining two (3.3%) with erythrodermic psoriasis. CONCLUSION: The incidence of psoriasis among dermatological patients in childhood and adolescence was 3.8%. The disease tends to appear earlier in girls than boys. The authors suggested that stress and upper respiratory infections are the most important triggering factors in childhood and adolescence psoriasis. 相似文献
2.
V Aerra M Kuduvalli AN Moloto AK Srinivasan AD Grayson BM Fabri AY Oo 《Journal of cardiothoracic surgery》2006,1(1):6-5
Background
Atrial fibrillation can occur in up to 40% of patients undergoing coronary surgery. 相似文献3.
4.
5.
Awoniyi O. Awonuga Nicola Dean Jamal Zaidi Rudiger U. Pittrof Jinan S. Bekir Seang-Lin Tan 《Journal of assisted reproduction and genetics》1996,13(4):293-297
Aim: Our aim was to compare the outcome in subsequent frozen embryo replacement cycles in four groups of patients who had elective cryopreservation of all their embryos because they were considered to be at increased risk of developing severe ovarian hyperstimulation syndrome.
Design: Sixty-two (91%) of 68 IVF cycles (68 patients) in which elective cryopreservation of all embryos was performed were analyzed. All patients continued on the GnRH agonist, buserelin, after oocyte recovery until the onset of vaginal bleeding. Frozen embryo replacement occurred in a hormone replacement cycle that started either on day 3 of the withdrawal bleed (group I;N=15) or after serum estradiol levels had fallen to <100 pmol/L (group II;N=16). The other patients commenced a frozen embryo replacement cycle several months later in either a hormone replacement (group III;N=15) or a natural (group IV;N=16) cycle.
Results: Two patients developed severe ovarian hyperstimulation syndrome. There were no significant differences among the four groups regarding demographic variables, the dose of hMG used, and the clinical outcome. There was a higher but not significantly different clinical pregnancy rate in group I (26.7%), compared to group II (12.5%), group III (13.3%), and group IV (18.8%).
Conclusions: Several options exist for the timing and protocol used for frozen embryo replacement in patients who had elective cryopreservation for the prevention of ovarian hyperstimulation syndrome, none of which was found to be clearly superior in this observational report.Presented at the 1994 Annual Conference of the American Fertility Society. 相似文献
6.
7.
8.
9.
10.
K A Gershman R T Rolfs S A Larsen A Zaidi N A Palafox 《International journal of epidemiology》1992,21(3):599-606
The annual numbers of reported cases of syphilis in the Republic of the Marshall Islands (RMI) increased from none in 1983 to more than 600 in 1989, suggesting a large outbreak of syphilis. Much of the increase resulted from expanded serological screening. The apparent outbreak of syphilis, therefore, may have been partly the result of increased surveillance or, since the RMI was formerly a yaws endemic area, possibly due to a resurgence of yaws. To address this problem and better characterize the epidemic, we analysed results from a 1989/90 Ministry of Health Services mass serological screening on Majuro Atoll, the main population centre. Serum specimens from 9160 people (86% of residents aged 15-44 years) on Majuro were screened with the rapid plasma reagin (RPR) card test; we repeated the RPR and performed a confirmatory microhaemagglutination assay for Treponema pallidum-specific antibodies (MHA-TP) on a sample of serum specimens. To estimate the seroprevalence of syphilis, we also tested a sample of RPR nonreactive specimens by MHA-TP. Among people less than 45 years of age, total (11.5%) and high-titre (5.2%) seropositivity rates were highest in the 20-24 year age group, as was MHA-TP seroprevalence (15.9%). These results suggested that a large outbreak of syphilis was responsible for the observed seroreactivity. Cumulative incidence modelling and comparisons with the results of a previous serosurvey conducted in 1985 suggested that the duration of the syphilis epidemic was approximately 10 years and that incidence had not increased appreciably since 1985. 相似文献