id	keyword
bcpe-2603	knowledge
bcpe-2603	payment
bcpe-2603	people
bcpe-2603	knowledge payment
bcpe-2603	anxiety
bcpe-2603	knowledge anxiety
bcpe-2603	information
bcpe-2603	education
bcpe-2603	expert
bcpe-2603	time
bcpe-2603	china
bcpe-2603	availability
bcpe-2603	system