说明文阅读策略 — 英语填空题

阅读下面的说明文片段。判断其主要组织结构，并在横线上填写。阅读时，可先关注连接词，再看作者如何安排信息。In one part of the city, families meet in a busy market. In another part, people gather in a quiet garden. The market is full of voices, while the garden offers a calm place to rest.本文主要采用 ___ 结构。