全文获取类型
收费全文 | 20235篇 |
免费 | 1682篇 |
国内免费 | 722篇 |
专业分类
耳鼻咽喉 | 263篇 |
儿科学 | 478篇 |
妇产科学 | 368篇 |
基础医学 | 2816篇 |
口腔科学 | 334篇 |
临床医学 | 2396篇 |
内科学 | 3792篇 |
皮肤病学 | 243篇 |
神经病学 | 1389篇 |
特种医学 | 581篇 |
外国民族医学 | 9篇 |
外科学 | 2165篇 |
综合类 | 1630篇 |
一般理论 | 7篇 |
预防医学 | 1522篇 |
眼科学 | 471篇 |
药学 | 1744篇 |
10篇 | |
中国医学 | 586篇 |
肿瘤学 | 1835篇 |
出版年
2024年 | 38篇 |
2023年 | 306篇 |
2022年 | 628篇 |
2021年 | 911篇 |
2020年 | 641篇 |
2019年 | 700篇 |
2018年 | 716篇 |
2017年 | 572篇 |
2016年 | 546篇 |
2015年 | 780篇 |
2014年 | 978篇 |
2013年 | 1079篇 |
2012年 | 1479篇 |
2011年 | 1482篇 |
2010年 | 897篇 |
2009年 | 766篇 |
2008年 | 1025篇 |
2007年 | 1082篇 |
2006年 | 987篇 |
2005年 | 944篇 |
2004年 | 764篇 |
2003年 | 711篇 |
2002年 | 631篇 |
2001年 | 346篇 |
2000年 | 371篇 |
1999年 | 408篇 |
1998年 | 231篇 |
1997年 | 254篇 |
1996年 | 220篇 |
1995年 | 171篇 |
1994年 | 171篇 |
1993年 | 123篇 |
1992年 | 172篇 |
1991年 | 133篇 |
1990年 | 129篇 |
1989年 | 117篇 |
1988年 | 104篇 |
1987年 | 111篇 |
1986年 | 92篇 |
1985年 | 69篇 |
1984年 | 63篇 |
1983年 | 77篇 |
1982年 | 39篇 |
1981年 | 36篇 |
1979年 | 35篇 |
1978年 | 30篇 |
1976年 | 36篇 |
1974年 | 35篇 |
1970年 | 32篇 |
1969年 | 31篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Lorusso F Kong D Jalil A. K. A A. AO 《世界核心医学期刊文摘》2006,2(6):25-26
目的:描述胚胎种植前遗传诊断在1例携带Ⅰ型白细胞黏附缺陷病(LAD-1)携带者并完成健康妊娠夫妇中的应用。设计:病例报道。机构:大学医院生殖中心。患者:1例男女双方都是LAD-1携带者的夫妇,女方CD18基因的外显子4携带有G400A置换,男方的外显子5携带有C562T置换。干预:标准体外受精(IVF)后第3天行卵裂期活检和分裂球遗传分析以检测2处突变以及21号染色体标记物。主要观察指标:1个未罹患LAD-1婴儿的出生。结果:得到15个卵母细胞,其中10个受精。8个胚胎适宜胚胎活组织检查。 相似文献
2.
Andrea DiMartini Nancy Day Mary Amanda Dew Lubna Javed Mary Grace Fitzgerald Ashok Jain John J Fung Paulo Fontes 《Liver transplantation》2006,12(5):813-820
For patients who receive a liver transplant (LTX) for alcoholic liver disease (ALD), investigators are focusing beyond survival to determine specific alcohol use outcomes. Studies suggest the use of alcohol ranges from 8 to 22% for the first post-transplant year with cumulative rates reaching 30 to 40% by 5 years following transplantation. Yet while investigators are interested in determining specific rates of alcohol use and predictors of use, only three studies since 1990 have been prospective. In 1998, we began a prospective study of post-LTX alcohol consumption in ALD recipients using multiple repeated measures of alcohol use. After 5 years of follow-up, we found that 22% had used any alcohol by the first year and 42% had a drink by 5 years. By 5 years, 26% drank at a heavier use (binge) pattern and 20% drank in a frequent pattern. In a univariate model, predictors of alcohol use included pre-transplant length of sobriety, a diagnosis of alcohol dependence, a history of other substance use, and prior alcohol rehabilitation. 相似文献
3.
4.
Abstract: Background: Identification of risk drinking in expectant fathers may be helpful as an important part of efforts to minimize maternal alcohol use, and as an opportunity to inform them about a problematic practice during a critical developmental stage for the couple. The purpose of this study was to evaluate the T‐ACE screening questionnaire, which asks about t olerance to alcohol, being a nnoyed by other's comments about drinking, attempts to c ut down, and having a drink first thing in the morning (“ e ye‐opener”), in the male partners of pregnant women who themselves were T‐ACE positive. Methods: Two hundred fifty‐four male partners were asked to complete the T‐ACE embedded in a health survey, the Alcohol Use Disorders Identification Test (AUDIT), and other questions about their alcohol use in the past 30 days when their pregnant partners had a median gestation of 11.5 weeks (T1). After delivery, male partners again completed the T‐ACE and quantity‐frequency questions (T2). The predictive ability of the T‐ACE and AUDIT was compared, using risk drinking (>4 drinks/day or >14 drinks/week) as the criterion standard. Results: A substantial minority of male partners had risk drinking, 31 percent at T1 and 25 percent at T2. Although the AUDIT was better than the T‐ACE as an independent predictor of risk drinking, the latter was most accurate when the tolerance threshold exceeded 2 drinks, the same established for pregnant women. The sensitivity (T1 = 84.6%, T2 = 82.8%) and specificity (T1 = 43.8%, T2 = 51.1%) of the T‐ACE at this threshold compared favorably with those of the AUDIT at the standard cut point of 8. Conclusions: The T‐ACE may be a practical way for clinicians to identify risk drinking in both pregnant women and expectant fathers. (BIRTH 33:2 June 2006) 相似文献
5.
Pierce A. Grace 《Irish journal of medical science》1997,166(3):152-156
6.
Of 7 plasmids we tested, the plasmid pORF2 was eliminated in vitro with the most efficiency by treatment with subinhibitory concentrations of novobiocin, coumermycin and 10 quinolones. It showed a cure rate of 43% by enoxacin; 12% by novobiocin, pefloxacin, ciprofloxacin and CI-934; 7% by coumermycin and ofloxacin; 9% by amifloxacin; and 4% by AM-833. On the other hand, pSC194, pBR322 and pMH612 were poorly cured in vitro by quinolones, except pSC194 which was cured 33% by enoxacin. R1, pP1603, and pUB110 were unaffected by the treatment. Mice were challenged intraperitoneally with a 2XLD50 of Escherichia coli carrying the ORF2 plasmid and were treated per os with 1 X or 1/2 X ED50 of either enoxacin or CI-934. The frequency of loss of ampicillin resistance determined 3 h after treatment shows curing effects of 92% for CI-934, 89% for enoxacin and 20% for untreated control. 相似文献
7.
8.
小儿呼吸道感染是小儿科最常见的疾病,以咽炎、扁桃体炎、气管炎和肺炎多见。病原体以病毒感染为主。未经治疗有诱发心肌炎、脑炎的可能,应积极进行有效治疗。我们自2004年6月至12月应用注射用穿琥宁冻干粉剂雾化吸入治疗小儿呼吸道病毒感染58例,取得满意效果,现总结报告如下: 相似文献
9.
Forty-six (85%) basal cell and eight (15%) squamous cell carcinomas of the eyelids were treated with electron beams between 1963 and 1983. Lesion sizes ranged from microscopic to 4 cm, with 28 lesions larger than 1 cm. Thirty-eight lesions were treated with radiotherapy after incisional biopsy, and 16 were treated after excisional biopsy (specimens showed positive margins). Doses varied from 45 to 72 Gy, with daily fractions ranging from 2.12 to 4.0 Gy. There were six disease recurrences (10.9%): three in the treatment field and three at the treatment margin. Four of six recurrences were subsequently controlled by limited surgical excision and repair with preservation of the eye, whereas the other two required enucleation. Treatment sequelae such as skin atrophy, telangiectasis, and cosmetic results were evaluated in terms of radiotherapy parameters, pretreatment surgery, and size of the lesion. In 44 patients, the overall cosmetic result was judged as good to excellent, five patients had a mild to modest degree of deformity, and five had significant deformity. Such deformity was usually associated with tumor destruction or previous surgery. No major complications were noted. 相似文献
10.
Charles Opondo Stephen Ntoburi John Wagai Jackline Wafula Aggrey Wasunna Fred Were Annah Wamae Santau Migiro Grace Irimu Mike English 《Tropical medicine & international health : TM & IH》2009,14(10):1165-1172
Objective To assess the availability of resources that support the provision of basic neonatal care in eight first‐referral level (district) hospitals in Kenya. Methods We selected two hospitals each from four of Kenya’s eight provinces with the aim of representing the diversity of this part of the health system in Kenya. We created a checklist of 53 indicator items necessary for providing essential basic care to newborns and assessed their availability at each of the eight hospitals by direct observation, and then compared our observations with the opinions of health workers providing care to newborns on recent availability for some items, using a self‐administered structured questionnaire. Results The hospitals surveyed were often unable to maintain a safe hygienic environment for patients and health care workers; staffing was insufficient and sometimes poorly organised to support the provision of care; some key equipment, laboratory tests, drugs and consumables were not available while patient management guidelines were missing in all sites. Conclusion Hospitals appear relatively poorly prepared to fill their proposed role in ensuring newborn survival. More effective interventions are needed to improve them to meet the special needs of this at‐risk group. 相似文献