舒服的副詞用英語怎么表達(dá)？

　　He seated himself comfortably at the foot of the bed.

　　他舒服地坐在床尾。

　　He reclined comfortably on a sofa reading a newspaper.

　　他舒服地斜躺在沙發(fā)上看報(bào)。

　　Some advice on how to carry backpacks comfortably and safely.

　　一些關(guān)于如何舒適安全地背背包的建議。