在喝白酒、黃酒、啤酒的頻率中,如果任意一個(gè)是often,那么ac就等于3；Among the frequencies of drinking lique,wine and beer,if any of them is often,ac equals 3;
　　否則（即剩下的情況）,任意一個(gè)頻率（指喝白酒、黃酒、啤酒的頻率）是sometimes,那么ac就等于2；Or any is sometimes,ac equals 2;
　　否則,任意一個(gè)頻率是previously often,那么ac就等于1；Or any is previous often,ac equals 1;
　　否則,任意一個(gè)頻率是never,那么ac就等于0；Or any is never,ac equals 0;
　　當(dāng)三個(gè)頻率都缺失時(shí),ac也缺失.And when none of the three exists,ac doesn't exist in turn.