go the extra mile

释义：“百尺竿头，更进一步”，形容为取悦他人而加倍努力，或以超出期望的方式完成指定的任务，常在推荐信和留学文书中出现。

例句：
He's a nice guy, always ready to go the extra mile for his friends.
That's what amateurs might do, but Real Entertainers go the extra mile.