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

2??????

3???????

4??????????????

5???????

????????6???????????????????16????????? ?????:?????????????“80????????”????????? ???

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

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

1984???????????????,??????,???????????????????????,????,?????????????,??

??????,??????????,???????“???????????????????”“???”,??“?????????????”,????“??????????,?????????????????”????????????????????2015?????,??????????????

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

“?????????,??????????????????,???????????,?????”????????????,????,??????????????????X???????,???????????

????????????,?,????,???????,??????????????????DR???????

?????????????,?60???????????????????,???500????????????????????????????????????????????????,?????CT???????????????????

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

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

“???15???20??????”???,??????????????????,??,???????????,??????????????????????

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

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

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

“???,?????????????,?????,??????????????????????????????????????????????????????????????????????????????,????,CT??????”????????????????????(??)

??????????????:???????????????