如题~以及如果不是的话，这里想学医，是选择港大好些呢还是内地本硕博连读的学校好些呢……

No. MBBS is an undergraduate programme.
If you want to work in HK, you may consider HKU MBBS. But you need to know basic practical Cantonese before get into this programme.
If you want to work in mainland, then i recommend you to study in mainland.