We should bravely help old people.
Everyone has parents or grandparents who might be old or already old.So when we come across the street,walk up stairs,or come out of the metro,if we happend to see some old people having trouble making their way home,we should treat them like our own family.Of course we can just leave them with their family or other people to deal with,but think in their position:what would we do when we are too old to climb the stairs?We would certainly appreciate a little bit help from others,no matter who.So be brave,and help out the old people,most of whom are not bad at all,because they just need a little push.