称小魏是二十年以前的事，如今他早已是老魏了，当年，我们在同在一个知青点务农。
O B-Person I-Person O B-Time I-Time I-Time I-Time I-Time O O O B-Time I-Time B-Person O O O B-Person I-Person O O B-Time I-Time O B-Person I-Person O O O B-Metric I-Metric B-Location I-Location I-Location O O O