舒適的副詞用英語怎么表達？

　　comfortably

　　副詞（adv. ）：舒服地；安樂地；充裕地。

　　He settled himself more comfortably in his chair. 他使自己在椅子上坐得更舒服些。

　　He can comfortably afford the extra expense. 他支付這些額外的費用毫無問題。

　　They are comfortably ahead in the opinion polls. 他們在民意測驗中遙遙領(lǐng)先。