A．It can warn office workers not to frown at work.
B．It can reduce the harm of facing the computer.
C．It can make office ladles' expressions lovelier.
D．It can absorb the computer's radiation.
A．Take mirrors along with them.
B．Spend more money on make-up.
C．Do some body exercise during work.
D．Do much more sports after work.
A．They emphasize on the importance of success.
B．They tell people how to have a good mindset.
C．They teach people how to avoid pressure.
D．They present the key factors to happiness.