下图中宁波到福州的沿海铁路已于2009年9月27日建成通车。影响该铁路线分布的主要因素是( )
A: Are you ill? B:________.
A: I'm tired. B:________ don't you go to bed?
A: I'm cold. B: Here is a ________ for you.
A: Come and have breakfast. B:________.
A: Here's a carton of milk for you. B:________.