由調查人員當面交給被調查人員問卷，說明方法，由之自行填寫，再由調查人員

由調查人員當面交給被調查人員問卷，說明方法，由之自行填寫，再由調查人員定期收回。

結果 (英文) 1:

By the investigator to be face to face questionnaire describing any method, filled in by the self, and then recovered by the investigating officers on a regular basis.

結果 (英文) 2:

The investigator's face-to-face questionnaire is given to the investigator, explaining the method, which is filled out by himself, and then regularly recovered by the investigator.

結果 (英文) 3:

The questionnaire shall be handed over to the respondents face to face by the investigators to explain the method, which shall be filled in by them, and then collected by the investigators on a regular basis.