1952年3月15日，这个天昏地暗的日子，父亲在川北医院溘然长逝了。
B-Time I-Time I-Time I-Time I-Time I-Time I-Time I-Time I-Time I-Time O O O O O O O O B-Time I-Time O B-Person I-Person O B-Location I-Location I-Location I-Location O O O O O O