to go the extra mile? 比別人多做一點(diǎn)點(diǎn)
　　
to make an extra effort in making a deal or providing service (from the Biblical proverb “if someone asks you to walk one mile, walk two miles”)
　　
EXAMPLE:
“In order to provide the best customer service, our computer systems company always went the extra mile and provided free installation and user training at the customer’s worksite.”