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