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