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