至于我(zhi4 yu2 wo3)=as for me.
嘛(ma) is an auxiliary word in Chinese, it doesn’t be used very often, especially by men in my opinion. When you say 至于我嘛~ ,the end sound will be a litter bit longer.
吗（ma1）is an auxiliary word too, but we always put 吗 in the behind of a question.
Examples: 你吃饭了吗？ Have your lunch yet? ；昨晚睡得好吗？Did you sleep well last night?
如一(ru2 yi1) means “all the same ,from the beginning to the end; from the inside aspect to the outside”= 一直（yi4 zhi2）or = 一致（yi2 zhi4）
表里如一（biao3 li3 ru2 yi1）means sb’s looking outside is the same as his/her character inside.
他每天都给她送花，十年如一日。He send flowers to her everyday, this last for 10 years.（keep sending flowers, never stop）