???????? ??????

????:????50?????:????

???????????????????(?????):??,?????????????,??????

???,??????????????200????????????6.2%???????????????4.5%?

??,???????????,????,??????????????,?????????????????????,??????????????????????????????????????????????

???,?????????10%?,?????????????700???????

??2.7??,??1.5?????????

???,?????????????,???????????????????????????????????????????“?????”??,??????????????,??? ????:????