Work gets done _______ when people do it together, and the rewards are higher too.[ ]

A. easily

B. very easy

C. more easily

D. easier

患者，男，70岁。患慢性阑尾炎数年，右少腹疼痛，遇寒、劳累加剧，反复发作，缠绵难愈。曾用西药消炎，当时痛止，后又复发。又因年老体弱，惧怕手术而求诊于中医。患者形体瘦弱，皮肤干燥粗糙，面色晦黄，精神萎靡，少气懒言。右少腹压痛明显，腹肌紧张，可扪及掌大包块，质软。舌质淡红，苔白，根部稍腻，脉数无力： 要求写出：诊断、病因病机、治法、选方、用药。