剛剛好正好用英文怎麼表達？

I experimented until I got the recipe just right.

我不斷地嘗試，直至找到正合適的烹飪法爲止。

He was just right for the part.

他是那個角色的'不二人選。

Sand this fine will be just right.

這樣粗細的沙子最合適。

He seemed to be just the right sort for the job

他似乎正是幹這個工作的合適人選。

As for doctors, when you go to see them they just look right through you.

說到醫生，你去看病時，他們直把你當透明的。