问及

In a sentence

• 当记者问及他的计划时，他显得很紧张。

  When the reporter inquired about his plans, he appeared very nervous.

  In this sentence, '问及' is used to indicate that the reporter asked or inquired specifically about a certain subject, namely 'his plans'.

• 老师问及学生的兴趣爱好，以便设计更有吸引力的课程。

  The teacher inquired about the students' hobbies to design more engaging courses.

  Here, '问及' conveys the action of asking about a particular topic, in this case, 'students' hobbies', for a specific purpose or reason.

• 我们不应当在不适合的场合问及个人问题。

  We should not inquire about personal matters in inappropriate situations.

  Here, '问及' is used to emphasize the appropriateness or inappropriateness of asking about specific topics, such as 'personal matters', in a given situation.