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