keenly
adv. 敏锐地；强烈地；锐利地
例句
He observes keenly, but says little.
他观察敏锐，但言语寥寥。
《牛津词典》
She remained keenly interested in international affairs.
她一直对国际事务有强烈的兴趣。
《柯林斯英汉双解大词典》
They're keenly aware that whatever they decide will set a precedent.
他们敏锐地意识到无论他们决定怎么做，都会开创先例。
