舒适的副词用英语怎么表达？

　　comfortably

　　副词（adv. ）：舒服地；安乐地；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. 他支付这些额外的费用毫无问题。

　　They are comfortably ahead in the opinion polls. 他们在民意测验中遥遥领先。