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某同学在自家菜地劳动时,左臂不慎被蛇咬伤,他马上用右手抓起旁边的一块砖头,砸死了这条蛇,他发现蛇的头呈三角形,嘴里有两颗尖尖的牙齿,于是他边用力挤伤口的血,边用自来水冲洗.
(1)他寻求家人的帮助,此时不能快跑,如果快跑将会导致______加快,蛇毒扩散加剧;
(2)去医院的时候,他还提醒家人把蛇带上,医生判断是剧毒的蝮蛇,马上给他注射了相应的抗蛇毒血清,这种治疗方法属于______免疫.
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