According to the passage, insufficient sleep is harmful in that it can cause all BUT ______ of the following.

单项选择题By saying insomnia is caused by life (Para. 3), the author means that ______.

单项选择题According to Waite and Gallagher's book, divorce is responsible for its harmful effects on all the following EXCEPT ______.

单项选择题It can inferred from Para. 4 that the author is ______.

单项选择题It can be inferred from this passage that the author holds a(n) ______ attitude towards the divorce revolution.

单项选择题Literally, academic mobility means ______.