舒服的副詞用英語怎麼表達？

He seated himself comfortably at the foot of the bed.

他舒服地坐在牀尾。

He reclined comfortably on a sofa reading a newspaper.

他舒服地斜躺在沙發上看報。

Some advice on how to carry backpacks comfortably and safely.

一些關於如何舒適安全地背揹包的建議。