People celebrate Chinese New Year ______ from house to house. [ ]

A. by go

B. in the way go

C. by going

D. on the way to go

应尽可能利用建筑物楼板和墙体内的钢筋构成（加密）屏蔽网，屏蔽网尺寸不宜大于（）。

A、100mmX100mm

B、200mmX200mm

C、150mmX150mm

D、120mmX120mm