尽管睡了十个小时，他的嗜睡症仍然让他在下午感到昏昏欲睡。

Despite sleeping for ten hours, his ___hypersomnia still made him feel drowsy in the afternoon.

医生认为她的嗜睡症可能是由甲状腺问题引起的。

The doctor suspected her ___hypersomnia might be caused by thyroid issues.