全文获取类型
收费全文 | 43681篇 |
免费 | 3930篇 |
国内免费 | 1972篇 |
专业分类
耳鼻咽喉 | 356篇 |
儿科学 | 728篇 |
妇产科学 | 651篇 |
基础医学 | 6271篇 |
口腔科学 | 1094篇 |
临床医学 | 4280篇 |
内科学 | 7548篇 |
皮肤病学 | 730篇 |
神经病学 | 3226篇 |
特种医学 | 1572篇 |
外国民族医学 | 5篇 |
外科学 | 5359篇 |
综合类 | 4681篇 |
现状与发展 | 3篇 |
一般理论 | 10篇 |
预防医学 | 2844篇 |
眼科学 | 1050篇 |
药学 | 4296篇 |
18篇 | |
中国医学 | 1038篇 |
肿瘤学 | 3823篇 |
出版年
2023年 | 255篇 |
2022年 | 731篇 |
2021年 | 1036篇 |
2020年 | 755篇 |
2019年 | 809篇 |
2018年 | 1092篇 |
2017年 | 923篇 |
2016年 | 931篇 |
2015年 | 1227篇 |
2014年 | 1453篇 |
2013年 | 1604篇 |
2012年 | 2209篇 |
2011年 | 2275篇 |
2010年 | 1365篇 |
2009年 | 1137篇 |
2008年 | 1757篇 |
2007年 | 1981篇 |
2006年 | 1848篇 |
2005年 | 1602篇 |
2004年 | 1482篇 |
2003年 | 1464篇 |
2002年 | 1281篇 |
2001年 | 2737篇 |
2000年 | 2584篇 |
1999年 | 2142篇 |
1998年 | 873篇 |
1997年 | 659篇 |
1996年 | 465篇 |
1995年 | 442篇 |
1994年 | 381篇 |
1993年 | 307篇 |
1992年 | 1112篇 |
1991年 | 971篇 |
1990年 | 847篇 |
1989年 | 933篇 |
1988年 | 850篇 |
1987年 | 782篇 |
1986年 | 718篇 |
1985年 | 634篇 |
1984年 | 402篇 |
1983年 | 326篇 |
1982年 | 187篇 |
1981年 | 146篇 |
1980年 | 126篇 |
1979年 | 206篇 |
1978年 | 86篇 |
1973年 | 93篇 |
1972年 | 93篇 |
1971年 | 94篇 |
1968年 | 83篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
3.
We report a Chinese family with members affected by epidermolytic ichthyosis (EI), caused by KRT gene mutations. The proband was a 14‐year‐old boy who had simultaneous appearance of nephroblastoma and epidermolytic ichthyosis (EI). Both the patient and his mother exhibited the specific clinical and pathological manifestations of EI. We analysed all exons and flanking sequences of the KRT1 and KRT10 genes using PCR, and found that the proband and his mother had a G>C transition at nucleotide position 1432 in exon 7 of KRT1, resulting in an amino acid substitution of glutamate (GAA) to glutamine (CAA) at codon 478 (E478Q). The KRT10 gene had no mutations. 相似文献
4.
5.
L.‐Q. Zheng X.‐C. Han Y. Huang H.‐W. Li X.‐D. Niu J. Li 《Clinical and experimental dermatology》2015,40(3):293-297
Porocarcinoma is an unusual, locally aggressive and potentially fatal neoplasm. Several cutaneous malignancies have been described in association with porocarcinoma, including squamous cell carcinoma, basal cell carcinoma and tricholemmal carcinoma. Previous reports have indicated that the occurrence of malignant tumours in combination with porocarcinoma is extremely rare, in particular with regard to Bowen disease (BD). We report an uncommon case of porocarcinoma occurring synchronously in a single BD lesion in a 63‐year‐old woman with multiple BD lesions. The clinical and histological findings confirmed this diagnosis. 相似文献
6.
7.
F. Giovanardi F. Nudo Q. Lai M. Garofalo A. Consolo E. Choppin De Janvry G.A. Arroyo Murillo P. Ursi D. Stabile F. Melandro P.B. Berloco R. Pretagostini L. Poli 《Transplantation proceedings》2019,51(1):128-131
Background
Arterial vascular anomalies in patients undergoing kidney transplantation (KT) are correlated with a higher incidence of early surgical complications, potentially causing graft loss. Arterial reconstruction allows patients to overcome these surgical challenges, thus minimizing the risk of poor outcomes. The aim of the present study is to retrospectively investigate the safety and effectiveness of the multiple arterial reconstruction technique with a Teflon patch in case of an unavailable aortic patch: to do so, surgical complications, graft function, and patient survival were evaluated.Methods
During the period January 2009 to August 2016, 202 adult deceased-donor KTs were performed at our center. Group A (n = 27; reconstruction of multiple arteries) and Group B (n = 175; control group) were compared.Results
No differences were observed between the 2 groups in terms of early postoperative course, with no vascular complication observed in Group A. No vascular patch infections were reported, nor longer cold ischemia time rates. Similarly, long-term survival rates were similar between the 2 groups.Conclusions
The Teflon-patch arterial reconstruction technique appears to be safe and effective, with an acceptable balance of benefits and potential risks of using a prosthetic material. Studies based on larger series are needed to further validate this approach. 相似文献8.
9.
目的 探讨扶正消瘤颗粒对原发性肝癌血清中血管内皮生长因子(Vascular endothelial growth factor,VEGF)和缺氧诱导因子-1α(Hypoxia inducible factor-1α,HIF-1α)表达的影响及临床意义。方法 选择符合纳入标准的原发性肝癌患者66例,按1∶1随机分试验组和对照组。观察治疗过程中两组VEGF、HIF-1α水平的变化及对患者临床疗效指标的影响。结果 (1)在性别、年龄、合并乙型肝炎、Child-Pugh分级、AFP值、临床分期方面,试验组和对照组差异无统计学意义(P > 0.05)。(2)肝癌患者在治疗各时间节点的VEGF和HIF-1α表达水平呈线性正相关(r = 0.829,P < 0.001)。(3)VEGF浓度在经导管动脉化疗栓塞术(Transcatheter arterial chemoembolization,TACE)后3月降至术前水平(P > 0.05),HIF-1α在TACE后3月仍高于术前(P < 0.05)。(4)扶正消瘤颗粒可降低HIF-1α水平,下调VEGF的表达。(5)扶正消瘤颗粒可减少TACE序贯RFA治疗后的不良反应,提高患者的生活质量(P < 0.05)。(6)血清中VEGF水平与生活质量无明显相关性(P > 0.05,r = 0.251),HIF-1α水平与生活质量存在正相关性(P < 0.05,r = 0.450)。结论 扶正消瘤颗粒可明显改善TACE序贯RFA治疗后患者生活质量,降低HIF-1α水平,下调VEGF的表达,抑制肿瘤血管生成。 相似文献
10.
M.‐Q. Man L. Ye L. Hu S. Jeong P. M. Elias C. Lv 《Clinical and experimental dermatology》2019,44(6):654-657
While therapeutic approaches for psoriasis are widely available, preventive regimens are lacking. We aimed to determine whether improvements in epidermal function could prevent psoriasis relapse. Two self‐controlled cohort studies were designed, enrolling two cohorts of patients with psoriasis (n = 30 and n = 60) to be treated topically with an in‐house‐prepared emollient or ATOPALM® cream applied twice daily to one forearm for 20 and 30 days, respectively, while the same sites on the contralateral arm served as the untreated control. Epidermal function on both arms was assessed prior to and at the end of the trials. Delayed relapse on the treated arm was seen in 54.5% and 71% of patients in the first and second cohort, respectively. The time of psoriatic relapse correlated with the extent of abnormalities in baseline epidermal function. These results suggest that improvements in epidermal function with topical emollients can prevent/attenuate the development of psoriasis. 相似文献