puzzleheadedness

例句：

1. 1. He was puzzled by the sudden change in his boss's behavior.
   他对老板突然的行为变化感到困惑。
2. 2.The child was perplexed by the story of the dragon and the unicorn.
   这个孩子对龙和独角兽的故事感到困惑。
3. 3. The scientist puzzled over the cause of the disease, unable to find a solution.
   科学家对这种疾病的原因感到困惑，无法找到解决方案。