舒服的副词英语怎么表达？

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.

他舒服地斜躺在沙发上看报。

Some advice on how to carry backpacks comfortably and safely.

一些关于如何舒适安全地背背包的建议。