????:1????????????:???????

2??????????

3?????90?????

4???????

5????????

?7??????????????????15???????????????? (???????????????????? ??)6???????????????15????,6?,70???????????????????,?????

???,??,6??,??????????????????0.5%,????????????????0.2??????????????????0.7%,???????????0.6%,??0.2?????????

???????,?????????????????,??????0.4%,????0.8???????,??????????????,?????????????0.2%?????0.5%????0.9%,???????0.1???????0.9%,?????????????????

????????6??,??,????????????????????,?????????????

?????????????????????,6??????????????????,70??????????????,????4?????????????????????,????????

???????????????????????,?????58??,??????????,??,????????????“??????????????????”???????,6???????????????????????????????????,??,????????(???????) ??????????????????:?????