he has seen more daytime television than is healthy. 这个than放在这里是什么意思?

这句话该如何理解?请给出分析思路
这个healthy放在这里有什么含义?

表示比较
he has seen more daytime television than is
他白天看电视的次数比平时多。
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第1个回答  2022-04-25
这里隐藏了一句 It is healthy to see tv in 1 hour a day. (具体几个hour无所谓,就是个概念)
He has see more daytime tv than it is healthy for him to see tv in 1 hour a day.
第2个回答  2017-09-17
比较级,表示程度追问

比较的话为什么than后面没有名词啊?is healthy 又该怎么理解呢?