开始

BlockTreeTermsReader

获取迭代器

IntersectTermsEnum

IntersectTermsEnum

中是否还有未处理的term?

结束

是否满足查询条件?

收集Term

u7_seg0 u7_seg1
u8_seg0 u8_seg1
u9_seg0 u9_seg1
u10_seg0 u10_seg1
u11_seg0 u11_seg1
u12_seg0 u12_seg1 u12_seg2
u13_seg0 u13_seg1 u13_seg2 u13_seg3 u13_seg4
u14_seg0 u14_seg1 u14_seg2 u14_seg3 u14_seg4