全文获取类型
收费全文 | 1776篇 |
免费 | 129篇 |
国内免费 | 45篇 |
专业分类
耳鼻咽喉 | 36篇 |
儿科学 | 74篇 |
妇产科学 | 10篇 |
基础医学 | 135篇 |
口腔科学 | 34篇 |
临床医学 | 209篇 |
内科学 | 365篇 |
皮肤病学 | 25篇 |
神经病学 | 32篇 |
特种医学 | 165篇 |
外科学 | 143篇 |
综合类 | 239篇 |
预防医学 | 125篇 |
眼科学 | 28篇 |
药学 | 137篇 |
中国医学 | 77篇 |
肿瘤学 | 116篇 |
出版年
2022年 | 14篇 |
2021年 | 32篇 |
2020年 | 22篇 |
2019年 | 13篇 |
2018年 | 27篇 |
2017年 | 37篇 |
2016年 | 25篇 |
2015年 | 44篇 |
2014年 | 61篇 |
2013年 | 80篇 |
2012年 | 88篇 |
2011年 | 120篇 |
2010年 | 87篇 |
2009年 | 80篇 |
2008年 | 119篇 |
2007年 | 89篇 |
2006年 | 66篇 |
2005年 | 73篇 |
2004年 | 55篇 |
2003年 | 62篇 |
2002年 | 53篇 |
2001年 | 42篇 |
2000年 | 39篇 |
1999年 | 49篇 |
1998年 | 33篇 |
1997年 | 30篇 |
1996年 | 34篇 |
1995年 | 24篇 |
1994年 | 18篇 |
1993年 | 17篇 |
1992年 | 27篇 |
1991年 | 32篇 |
1990年 | 18篇 |
1989年 | 23篇 |
1988年 | 29篇 |
1987年 | 25篇 |
1986年 | 28篇 |
1985年 | 39篇 |
1984年 | 19篇 |
1983年 | 14篇 |
1982年 | 14篇 |
1981年 | 14篇 |
1980年 | 14篇 |
1979年 | 18篇 |
1978年 | 14篇 |
1977年 | 15篇 |
1976年 | 10篇 |
1975年 | 14篇 |
1974年 | 9篇 |
1973年 | 9篇 |
排序方式: 共有1950条查询结果,搜索用时 11 毫秒
101.
Isolated large vestibular aqueduct syndrome in a family 总被引:11,自引:0,他引:11
This paper presents the second case in the literature of large vestibular aqueduct syndrome without associated cochlear anomalies in 2 members of the same family. The syndrome is frequently associated with sensorineural hearing loss presenting in childhood. The onset is commonly sudden, following an event causing increased intracranial pressure. On the basis of an emerging pattern of inheritance, we recommend screening siblings of an affected child. We also discuss the importance of characterizing the extent of disease of the inner ear. 相似文献
102.
OBJECTIVE: To compare the effectiveness of acetaminophen versus acetaminophen with codeine after pediatric tonsillectomy and adenoidectomy. STUDY DESIGN: Prospective, randomized, double-blind study. METHODS: Fifty-one children ages 3 to 12 years scheduled for outpatient tonsillectomy and adenoidectomy were studied. Patients were randomly assigned to receive acetaminophen or acetaminophen with codeine in unlabeled bottles for postoperative pain control. The Wong-Baker FACES pain rating scale was used to help children quantify their level of pain after surgery. The level of pain, quantity of pain medication required, presence of side effects, and the percentage of a normal diet consumed was recorded for 10 postoperative days. RESULTS: There was no difference (P > .05, all time points) in the level of postoperative pain reported by the parents and children in the two groups. The acetaminophen with codeine group tended to have increased problems with nausea, emesis, and constipation, but these differences did not reach statistical significance. Children in the acetaminophen group consumed a significantly higher percentage of a normal diet on the first 6 postoperative days (P < .05, all time points). CONCLUSION: There was no difference in the level of pain control provided by acetaminophen and acetaminophen with codeine as measured by the Wong-Baker FACES pain rating scale. Postoperative oral intake was significantly higher in children treated with acetaminophen alone. 相似文献
103.
PURPOSE: To determine current beliefs regarding ankyloglossia and its treatment. DESIGN: Anonymous written survey. PARTICIPANTS: Otolaryngologists (OTO, n=423), pediatricians (PD, n=425), speech pathologists (SP, n=400), and lactation consultants (LC, n=350) were randomly selected from professional membership lists, with a response rate of 209 (49%), 235 (55%), 150 (37.5%), and 203 (58%), respectively. CLINICAL FINDINGS: Sixty-nine percent of LCs, but a minority of physician respondents, believe tongue-tie is frequently associated with feeding problems. Sixty percent of OTOs, 50% of SPs, but only 23% of PDs believe tongue-tie is at least sometimes associated with speech difficulties. Sixty-seven percent of OTOs versus 21% of PDs believe tongue-tie is at least sometimes associated with social/mechanical issues. Surgery is recommended at least sometimes for feeding, speech, and social/mechanical issues by 53, 74, and 69% of OTOs, respectively, but by only 21%, 29%, and 19% of PDs. CONCLUSION: The significance of ankyloglossia in children remains controversial, both within, and between, specialty groups. 相似文献
104.
目的通过训练大鼠急进高原模型从心肌组织形态和酶谱改变,研究训练对心肌损伤的防护。方法于海拔1520m实地环境设实验组(EG)采用中药抗疲I号加入常规饲料中喂养,对照组(CG)常规饲料喂养,EG、CG各40只游泳训练4周后,各选35只3h急进海拔3850m实地静息1.5h,从中各选10只作为静息对照采集标本,EG、CG各20只游泳至力竭后1h、24h采集标本;测定比较各组心肌酶谱指标等,镜下观察比较各组心肌形态变化。结果EG血中心肌酶谱指标1h、24h指标均优于CG1h、24h结果;心肌组织学结构从纵断面看,EG心肌结构清晰,肌丝细密,横纹清楚,核周无空隙;横断面心肌纤维群间隙小,毛细血管平均为10~12个/HPF;CG心肌纤维界限不清晰,肌丝分散,横纹不清楚,横断面心肌纤维群间隙增宽,毛细血管平均为3~5个/HPF,毛细血管腔扩张,红细胞堆积,提示有水肿。结论急进高海拔地区运动后可使心肌纤维缺氧水肿,血中心肌酶谱增高,同时会使心肌营养不良而发生结构改变,对心肌的供氧能力好坏必然决定运动能力强弱,过度训练、改变运动集训环境或强体力劳动均可引起心肌供血能力下降,本研究是通过抗疲I号加入食品干预训练大鼠的,有利于改善心肌营养与供氧状况,并能降低心肌纤维水肿发生。 相似文献
105.
Curtis JE Hao Y Messner HA Lipton JH Lowsky R Quirt IC Sturgeon JF Zanke B Keating A Minden MD 《Hematology (Amsterdam, Netherlands)》2000,5(3):177-187
Combination high-dose cytosine arabinoside (ARA-C) and daunorubicin (DNR) for primary remission induction of patients with acute myeloblastic leukemia (AML) was evaluated in a single institution study. Patients aged 55 or less with an HLA-sibling received an allogeneic bone marrow transplant (alloBMT) in first remission; other responders were offered autologous BMT (autoBMT). For remission induction 93 patients aged less than 60 received DNR 45 mg/m(2) BSA x 3 and ARA-C 2 gm/m(2) BSA every 12 hours for 12 doses; 53 aged 60 or older DNR 25 mg/m(2) daily x 3 and ARA-C 1.5-2.0 gm/m(2) BSA every 12 hours for 12 doses. Consolidation doses of DNR were the same but ARA-C 100 mg/m(2) BSA/day x 5 was given by continuous intravenous infusion. The complete remission rate for patients less than 60 years was 69.9% (95% CI: 59.5-79.0%) and 47.2% (95% CI: 33.3-61.4%) for the older patients. The median duration of first remission for the younger patients was 13.0 months and of overall survival 17.9 months; for patients over 60 years 5.6 and 10.0 months respectively. Disease-free survival and overall survival of the 19 patients receiving alloBMT and the 13 patients undergoing autoBMT aged less than 55 years and in first or second complete remission were significantly increased compared with 22 patients in remission but not having BMT (p < 0.001 and p < 0.013). The results support the effectiveness of high-dose ARA-C for remission induction, a need for intensive consolidation therapy and a role for BMT in the management of AML. 相似文献
106.
AM Pierides HA Ellis H Dellagrammatikas JE Scott AW Norman 《Archives of disease in childhood》1977,52(6):464-472
Three children with azotaemic renal osteodystrophy were treated with 1,25-dihydroxycholecalciferol (1,25(OH)2D3). All showed clinical, biochemical, and radiological improvement within 6 months of starting treatment. There were no complications. The dose of 1,25(OH)2D3 required was 0-5 microgram per day for 2 children aged 22 and 30 months, and 2 microgram per day for a 15-year-old boy. 2 of the patients were receiving phenobarbitone and phenytoin and in one of them prior treatment with dihydrotachysterol 0-5 mg daily and 6 microgram 1alpha-hydroxycholecalciferol (1alphaOHD3) daily had failed to induce improvement. In one patient, in whom serial iliac bone samples were available, 2 microgram 1,25(OH)2D3 resulted in histological improvement in previously severe osteomalacia. 1,25(OH)2D3 appears to be an effective and safe drug in the treatment of uraemic osteodystrophy. 相似文献
107.
目的 观察开角型青光眼患者静态视野黄斑光阈值改变,探讨测定黄斑光阈值与青光眼早期视功能损害的关系。方法 采用Dicon全自动静态阈值视野计,分别对89例开角型青光眼(早期青光眼45例,中晚期青光眼44例)和正常人40名黄斑光阈值进行测定。结果 早期青光眼患者黄斑光阈值明显高于正常对照组,中晚期患者高于早期患者,3组数据差异有统计学意义。结论 测定黄斑光阈值对于青光眼早期视功能损害的评价有一定的临床意义。 相似文献
108.
109.
110.
目的;探讨慢性光化性皮炎(CAD)的病因,诊断及治疗,方法:查阅文献,对引起CAD的光敏物、发病机理及治疗进行分析,结果:约11%的CAD患者有光敏物接触史;62%光敏性隐匿;27%有慢性皮炎病史;结论:CAD发病与光变态反应有关,避光治疗有效。 相似文献