食用 / 毛蚶 / 前 / 必须 / 彻底 / 煮熟 / 以防 / 感染 / 甲肝 / 病毒食用毛蚶前必须彻底煮熟,以防感染甲肝病毒。Before eating blood clams, they must be thoroughly cooked to prevent infection with hepatitis A virus.