转眼大哥二十天的假期结束了，临走的那一天，我故意给大哥提着行李送大哥去车站。
O O B-Person I-Person B-Metric I-Metric I-Metric O B-Thing I-Thing O O O O O O O B-Time I-Time I-Time O B-Person O O O B-Person I-Person O O B-Thing I-Thing O B-Person I-Person O B-Location I-Location O