找出下面这封辞职信在写作技巧上的不足之处,并将其加以改进。
A.Dear B.Wang: C.As we discussed in your office yesterday, D.The reasons,as E.I told you, are that F.I have had an offer to take a much bigger job at a substantially greater salary than G.I am earning at H.Houston I.And the opportunity for advaneement cannot be matched in this company J.I will continue,as in the past,to perform my dutles as budget director in a responsible manner,and K.I stand ready to do whatever L.I can to help my replacement M.Sincerely,