医疗保健仍然是一个热点话题。

Health care is still ___a ___hot ___topic.

竞争还是合作已成为当今社会的一个热点议题，无论是在公共还是私人领域。

Whether to compete or to cooperate has become ___a ___hot ___issue in today's society, both in public and private.

气候变化是政治辩论中的一个热点议题。

Climate change is ___a ___hot ___issue in political debates.