因为公差赶火车，我不得不从凌晨4点的温暖被窝里起来，在路边等单位的车送站。
O O O O O B-Thing I-Thing O B-Person O O O O B-Time I-Time B-Abstract I-Abstract O O O B-Thing I-Thing O O O O O B-Location I-Location O B-Organization I-Organization O B-Thing O O O