题目如图,在△ABC\triangle ABC△ABC中,DDD为线段ACACAC上一动点,连接BDBDBD,过点CCC作CH⊥BDCH\bot BDCH⊥BD于HHH,BCBCBC为222\sqrt{2}22,则CH+BHCH+BHCH+BH最小值为:______;CH+BHCH+BHCH+BH最大值为______.知识点:圆周角定理I章节:图形的性质 / 圆