A two-year questionnaires survey was conducted in parents and children attending SD-EEG in the Electro-medical Diagnostic Unit, Tuen Mun Hospital.

屯门医院电子医学诊断部门为参与睡眠剥夺脑电图的父母及孩子开展了一个为期两年的问卷调查。

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Method: the questionnaires survey in 25 hearing AIDS fitting stores in Sichuan, Chongqing, Yunnan, Shanxi and Beijing was carried out and the results analyzed.

方法：对四川、重庆、云南、山西及北京地区共2 5家助听器验配店的验配师，进行助听器验配向导问卷调查。

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A total of 600 participated the questionnaires survey, By way of questionnaire survey, oral examination was performed to observe the prevalence situation of OSF.

采用问卷调查的方式调查所被抽查对象的槟榔咀嚼情况，并进行口腔检查以观察OSF发病情况。

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Skytrax's World Airport Awards are based on 12.1 million survey questionnaires filled out by passengers covering 108 different nationalities and 395 airports worldwide during a nine-month survey period in 2012 and 2013.

CNN: U.S. airports don't stack up

The NFER research was based on a survey of 3, 789 schools which had responded to a similar survey in 2006, plus questionnaires sent to all local authorities in England.

BBC: More primaries teaching languages

Southwest launched a new survey program last year that sends questionnaires to customers the day after they fly.

WSJ: What United, American, Delta, Southwest, JetBlue, Alaska, Virgin America Airlines Learn From Customer Surveys