A younger brother who hated his sister so much

(1)My sister hated it so much
(2)I was looking at my mom’s treatment on the 4th floor of the hospital building, and my sister and I were buying nutritional supplements at the pharmacy on the 1st floor
(3)Suddenly the fire alarm went off all over the building
(4)My sister and I ran out of the pharmacy and she said
(5)”Hey, don’t come in. I’m waiting for you outside”. Then, I’ll take the stairs. 4
(6)He ran up to the floorwithout hesitation
(7)We don’t have the same personality and we don’t talk much
(8)If you look at things like this, you’re really older than me
(9)The person who sincerely gives it to me in a crisis is my family
(10)I think that’s all
(11)Fortunately, it was a fire alarm that went off wrong