结论：HLA配型、交叉组配型可显著提高供受者的HLA相配率，对选择最佳的供者，降低早期急性排斥反应的发生，提高肾移植效果具有重要的意义。

Conclusion:HLA typing and HLA crossreactive antigen group(CREGs) matching play an important role in selecting suitable donor, reducing early rejection, improving the effect of kidney transplantation.

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因此，研究公路平面交叉口的安全诊断改善技术对于提高整个公路系统的交通安全，降低交通事故率和死亡率具有重要的意义。

So the study of highway intersection safety diagnosis and improvement method is very important to low death and injuries, as well as improving the whole highway system traffic safety.

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