這個語境用 persistent or perseverant較為安全，因為

來源: 於 2012-04-08 17:13:10 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次
one track mind   會讓人聯想這個：
1. an individual who can only focus on one thing at a time

2. someone who always thinks about sex