题目：
多选题
Which ones of the following sentences about hypertension are correct?
- A. Each person's blood pressure doesn't change from day to day.
- B. There will be two thumping sounds for recording when take blood pressure.
- C. Blood pressure varies from person to person.
- D. Hypertension is 140/90 mmHg or even higher.
- E. Each person's blood pressure changes from hour to hour.
答案：
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