海棠树盛开的日子，我常常徘徊在树下，时常想起总理夫妇欣赏海棠的情景。
B-Thing I-Thing I-Thing O O O B-Time I-Time O B-Person O O O O B-Location I-Location I-Location O O O O O B-Person I-Person I-Person I-Person O O B-Thing I-Thing O O O O