网友重新检查句子，lose focus, alertness and focus：两个 focus？

People who stay up late every night are twice as likely to gradually lose focus, alertness and focus as those who get enough sleep. 

删繁就简（看红色）：

People who stay up late every night are twice as likely to gradually lose alertness and focus as those who get enough sleep.

People are likely to lose alertness and focus.

基本结构：be likely to do sth.  然后把as...as...比较结构加进去即可。