13. 越來越多觀光客至海外就醫，造成醫療觀光興起。
(A) The better health care is developed, the more tourists it will eventually attract.
(B) More and more people travel overseas for both health care and tourism reasons.
(C) The boom in medical tourism results from more tourists’ seeking health care abroad.
(D) The boom in medical tourism has accompanied with the strong marketing in health care.

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