persist例句

If the symptoms persist, it is important to go to your doctor.
如果这些症状持续存在,一定要去看医生。

Existential questions requir-ing religious answers still persist.
需要通过宗教来解释的关乎人类存在的问题仍然存留。

Why do you persist in blaming yourself for what happened?
你何必为已发生的事没完没了地自责?