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Straightforward or blunt or simple are used to express your notion .

How many people have simple lives and are so blunt to his career  ?

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Metaphor is often have to travel between two places.

比喻经常奔波于两个地方之间

 For example: home and unit (school), dormitory and classroom, etc., is two point one line.

例如：家和单位（学校），宿舍跟教室等，就叫两点一线。

The so-called "two point one line" life, said the life is monotonous。

所谓“两点一线”的生活，说的是生活比较单调