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