题目内容：
请在第______填上正确答案.
A．The device could be used to take a picture of your body each week, then compare it with previous images. B．That is going to be the difficult part.
C．The cut could then be treated instantly so avoiding possible complications.
D．Experts are also working on a "digital doctor", completing it with a comforting bedside manner.
E．Instead of relying on hi-tech hospitals, the emphasis is shifted to the home and easy-to-use gadgets.
F．A toothbrush that checks blood sugar and bacteria while you brush is currently in development in USA .
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