一天，无意中发现办公桌下砖缝里，有一个一寸来高毛茸茸的小东西。
B-Time I-Time O O O O O O B-Location I-Location I-Location I-Location B-Thing I-Thing B-Location O O B-Metric I-Metric I-Metric I-Metric O O O O O O B-Thing I-Thing I-Thing O