新緑

fill v)満たす

fill me up

I had a bag of chips for lunch but it didn't fill me up.

fill me

Watching them together fills me with joy.

I would be more likely to say "fill me up" rather than "fill me".

There is no rule, just idiom.

The Golden Week

happy times=the golden week

billion(一兆）of people

Do you take a lot of days off?

You'd had a work on that day? その日は働く？

It's like a spread holiday. 飛び石連休

spread ｽﾌﾟレｯﾄﾞ v)広げて伸ばす、散らして配置する、まき散らす