“stressful life event”造句，怎麼用stressful life event造句

These studies also looked at the roles of stressful life events, genotype at the serotonin transporter gene, and the resulting depression risk.

Dear Tired: "the loss of a job is one of the most stressful life events," notes Jayne Mattson.

I'd like them to be controlled for stressful life events if at all possible (say, a big class of undergrads all taking the same class, though that would have bias of its own).