helpfully
adv. 有益地；有用地
例句
'Let me explain!' he added helpfully.
“让我来说明一下！”他热心地补充道。
《牛津词典》
He gave his name and then helpfully spelled it.
他说出了他的名字，然后又热心地把它拼读了出来。
《柯林斯英汉双解大词典》
She helpfully suggested that I try the local library.
她很热心地建议我试试本地的图书馆。
