多层脚手架多像一张五线谱，上面施工操作的工人又多像一个个音符。音符按照作曲家的排位排列有序，就会奏出不朽的乐章。如果哪怕是一个音符或高或低，整个乐章就会被破坏。作曲家会毫不客气地把它替换掉。安全与危险的道理大概人人都明白，但心存侥幸而忽视危险存在的人... Multi-storey scaffolding is more like a stave than workers in construction operations are more like one note. Notes in accordance with the order of arrangement of the composer, it will play an immortal movement. If even a note is either high or low, the entire movement will be ruined. The composer will unceremoniously replace it. Probably safe and dangerous, everyone understands, but is lucky enough to ignore the dangers that exist ...