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