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