全文获取类型
收费全文 | 54366篇 |
免费 | 3969篇 |
国内免费 | 1391篇 |
专业分类
耳鼻咽喉 | 834篇 |
儿科学 | 695篇 |
妇产科学 | 623篇 |
基础医学 | 8619篇 |
口腔科学 | 786篇 |
临床医学 | 5252篇 |
内科学 | 9646篇 |
皮肤病学 | 1727篇 |
神经病学 | 3836篇 |
特种医学 | 2953篇 |
外国民族医学 | 8篇 |
外科学 | 6466篇 |
综合类 | 2759篇 |
现状与发展 | 7篇 |
一般理论 | 16篇 |
预防医学 | 2603篇 |
眼科学 | 1501篇 |
药学 | 5537篇 |
18篇 | |
中国医学 | 1463篇 |
肿瘤学 | 4377篇 |
出版年
2024年 | 58篇 |
2023年 | 450篇 |
2022年 | 1315篇 |
2021年 | 2292篇 |
2020年 | 1306篇 |
2019年 | 1558篇 |
2018年 | 1801篇 |
2017年 | 1458篇 |
2016年 | 1993篇 |
2015年 | 2802篇 |
2014年 | 3316篇 |
2013年 | 3550篇 |
2012年 | 5104篇 |
2011年 | 4984篇 |
2010年 | 3065篇 |
2009年 | 2535篇 |
2008年 | 3361篇 |
2007年 | 3135篇 |
2006年 | 2705篇 |
2005年 | 2553篇 |
2004年 | 1981篇 |
2003年 | 1665篇 |
2002年 | 1427篇 |
2001年 | 864篇 |
2000年 | 850篇 |
1999年 | 679篇 |
1998年 | 349篇 |
1997年 | 298篇 |
1996年 | 213篇 |
1995年 | 204篇 |
1994年 | 185篇 |
1993年 | 132篇 |
1992年 | 211篇 |
1991年 | 213篇 |
1990年 | 166篇 |
1989年 | 143篇 |
1988年 | 108篇 |
1987年 | 99篇 |
1986年 | 97篇 |
1985年 | 69篇 |
1984年 | 56篇 |
1983年 | 53篇 |
1982年 | 34篇 |
1981年 | 37篇 |
1980年 | 28篇 |
1979年 | 43篇 |
1978年 | 25篇 |
1977年 | 21篇 |
1976年 | 18篇 |
1974年 | 24篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
留置双J管病人的观察与护理 总被引:2,自引:0,他引:2
双J管又称双猪尾管,因两端卷曲,每端形似猪尾而得名。由于其支架和内引流作用,能解除输尿管炎症、水肿造成的暂时性梗阻,防止术后伤口漏尿和输尿管狭窄。同时,集合系统不与外界直接相通,可避免肾造瘘所引起的出血、感染,因无外引流管的限制和不适感,病人可早期下床活动,有利于术后康复。2004年7月-2005年2月我院先后为58例病人应用双J导管.效果良好,现报告如下。 相似文献
72.
作者用免疫组化ABC法对41例胆囊癌标本核苷二磷酸激酶(NDPK,下同)/nm23表达进行了测定,结果发现:nm23在恶性肿瘤中的表达率明显高于良性病变(P<0.05)。NDPK/nm23表达与胆囊癌组织的分化、局部浸润及淋巴转移密切相关(P<0.01)。NDPK/nm23阳性患者生存中位数12.25个月,阴性患者6.5个月,两者存在显著差异(P<0.01),提示nm23检测对预后有重要价值。 相似文献
73.
In a period of 2 years 7 months, we performed heat probe (HP) thermocoagulation in 153 cases of massive peptic ulcer hemorrhage. The male/female sex ratio was 125/28. The average age was 57.6 +/- 1.3 years (mean +/- SEM; range, 17 to 88). There were 69 cases (45.1%) of spurting hemorrhage, 50 cases (32.7%) of oozing hemorrhage, and 34 cases (22.2%) of nonbleeding visible vessels. Seventy-seven patients (50.3%) were in shock before therapy. After therapy we obtained initial success in 147 cases (96.1%). Rebleeding episodes occurred in 23 patients (15.6%) within 1 month after therapy. Nineteen patients received a second therapy, and treatment in 15 of these cases (78.9%) was ultimately successful. Finally, treatment in 142 cases (92.8%) was ultimately successful. The duration of hospitalization was 6.3 +/- 0.4 days (mean +/- SEM). After discharge all patients were followed at the outpatient department for at least 1 month. Sixty-seven patients were followed endoscopically for at least 2 to 3 months after therapy. Fifty-six patients (83.6%) had a healed scar at the previous bleeding site 2 months after therapy, and 62 patients (92.5%) had a healed scar 3 months after therapy. We conclude that HP thermocoagulation is an ideal and reliable modality of therapeutic endoscopy in arrest of massive peptic ulcer hemorrhage. HP thermocoagulation may become the first choice of therapy for massive peptic ulcer bleeding in the near future. 相似文献
74.
目的总结分析1%联苯苄唑凝胶治疗婴儿花斑癣的临床疗效及不良反应。方法对22例婴儿花斑癣患者采用外用1%联苯苄唑凝胶治疗2周,总结分析其临床资料。结果外用1%联苯苄唑凝胶2周后,总有效率达到90.91%,真菌清除率达到86.36%。结论联苯苄唑凝胶治疗婴儿花斑癣安全、有效,不良反应少。 相似文献
75.
Jung Han Kim Sang Jun Lee Young Bok Han Jung Jo Moon Jong Bae Kim 《Archives of pharmacal research》1994,17(2):115-118
This paper describes the isolation of isoguanosine from Croton tiglium L. and its cytotoxic effect against several tumor cell lines in culture and newly reports that isoguanosine has an antitumor activity against implanted S-180 ascitic tumor mice. Isoguanosine is effective at the dose of 24 mg/kg/day x 5, with T/C value of 168%. Isoguanosine inhibits the growth of S-180 and Ehrlich solid tumor in mice at the optimal doses of 96 mg/kg/day x 12 and 48 mg/kg/day x 12, with 1-T/C values of 65% and 60%, respectively. 相似文献
76.
77.
石刻雕塑作业劳动卫生学调查及实验研究 总被引:1,自引:0,他引:1
测定了石雕作业粉尘浓度,几何平均浓度为82.35~3.67mg/m3。工人职业性健康检查结果,接尘工人的咽部充血、咳嗽、咯痰检出率高于对照组;肺功能低下的检出率也高于对照组。该厂自1972年以来发生尘肺患者17例,其病情发展和晋期缓慢,发病工龄长。动物实验研究表明,石雕粉尘有轻微的致纤维化作用。 相似文献
78.
Kyung Bok Lee Jong Sig Kim Sang Tae Kwak Wonbo Sim Jong Hwan Kwak Yeong Shik Kim 《Archives of pharmacal research》1998,21(5):555-558
Chondroitin sulfates were isolated from the mud snail. For the quantitative analysis of enzymatic digestion products of isolated
chondroitin sulfates, strong anion exchange-high performance liquid chromatography (SAX-HPLC) was performed. By the action
of chondroitinase ABC, three unsaturated disaccharides 2-acetamide-2-deoxy-3-O-(β-D-gluco-4-enepyranosyluronic acid)-D-galactose (ΔDi-OS), 2-acetamide-2-deoxy-3-O-(β-D-gluco-4-enepyranosyluronic acid)-6-O-sulfo-D-galactose (ΔDi-6S) and 2-acetamide-2-deoxy-3-O-(β-D-gluco-4-enepyranosyluronic acid)-4-O-sulfo-D-galactose (ΔDi-4S) were produced from the mud snail chondroitin sulfates. The analysis showed that relative proportion
of ΔDi-OS/ΔDi-6S/ΔDi-4S was 58.7/3.1/38.2. The immunomodulating activity of chondroitin sulfate was examined by cell proliferation
assay and these results suggest that it might be a immunosuppressant. 相似文献
79.
J. K. Kang Sang Won Lee Min Woo Baik Byung Chul Son Yong Kil Hong Chul Ku Jung Keon Hee Ryu 《Child's nervous system》1998,14(7):297-301
Accurate assessment and replacement of blood loss and fluid–electrolyte deficit during craniosynostosis repair is difficult
owing to patient size and the diversity of surgical technique. Forty-three patients undergoing primary craniosynostosis repair
over a 10-year period were studied retrospectively to determine blood loss and fluid deficit and to assess blood transfusion
practices during both intraoperative and postoperative periods. Blood loss was calculated on the basis of estimated red cell
mass (ERCM) and fluid-electrolyte imbalance was investigated with blood samplings. Blood transfusion was considered appropriate
if the postoperative or posttransfusion ERCM was within 12% of the preoperative value. Estimated fluid requirement (EFR) was
used in 4 ml kg–1 h–1 except for neonates. Intraoperatively, 80% of all patients were appropriately managed with respect to blood transfusion and
EFR. Postoperatively only 20% of the patients receiving transfusions were transfused appropriately. In 23.3% of these patients
(10/43) unexpected respiratory distress developed immediately after their recovery from the anesthesia. With the measurement
of estimated blood volume and allowable blood loss, appropriate transfusion could be achieved for the successful treatment
of the primary craniosynostosis.
Received: 16 February 1998 相似文献