尽管天气恶劣，他仍然坚持每天晨跑。

Despite the bad weather, he remains ___persistent in his daily morning runs.

他的背部疼痛持续了几个月。

He has been suffering from ___persistent back pain for several months.

尽管遇到很多困难，她仍然坚持不懈地练习钢琴。

Despite many difficulties, she remains ___persistent in practicing piano.

尽管尝试了多种方法，他的头痛问题依然持续。

Despite trying various remedies, his ___persistent headache still bothers him.