{??? a 3-stage ?????? ??????????????? ????????????????????????????? ?????? ??????? ???? in to the Fisher-??????????????????????????? |?????1% ???????{??|??|???|??|?????|????{??|??????|????? 1 ???| |????? 1 ?|???? 1 ?|???? 1 ?|???? 1 ?|???? 1 ?|?????????? — ????????????????????????????? |??? ??????? ??? ???????????????????????????????????????????