effusiveness

她的热情洋溢让新同事感到十分自在。

Her ___effusiveness made the new colleagues feel completely at ease.

这位作家的散文以情感的热烈奔放而著称。

The essayist is known for the emotional ___effusiveness in her prose.

在正式晚宴上，他那种毫不掩饰的热情显得有些不合时宜。

His unguarded ___effusiveness seemed out of place at the formal dinner.