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

2?????

3???????

4?????spa???????

5?????????????

?????2??????18??????????? (??????? ???)?????18????,????,??“???”,????????????,?????????????????????“?????????????”??????????????????,???????????????,?????????????

????????“??”?????????,????????????????,???,????????????50??????????????(???????????????)??,???500?,??1-3?????,???????0.3%-0.5%/???????????,???????,????????????,???????????,????????,?????????????????????????????

???????,“???”??????????????????????,??????????????????????????,????????,????????20?????(?????)??????0.3%/????????,20??0.5%/????????????????????????????????????

???,?????“???”???20???(???)???,????????????????20????????????????,???????????????,???????????????????????????????????????????????(??????????????) ??:????????