幸运的是，手术完全成功。

___Happily, the operation was a complete success.

幸运的是，我遇到了一位可以带我去学校的朋友！

___Happily, I had met a friend who could take me to school!

幸运的是，天气及时放晴，适合野餐。

___Happily, the weather cleared up just in time for the picnic.