根据短文理解完成下列各题。

Do you like South Korean actor Lee Min Ho? The "flower boy" plays a cool secret agent(特工) in his new TV drama City Hunter (《城市猎人》). To play the part well, Lee did many unusual things like riding an elephant and standing on top of a big tree.

About Lee Min Ho Birthday: June 22, 1987 Height: 186cm Weight: 69kg Favourite food: meat

Favourite colors: black, white and red

Dear sir ,
   I have travel every day from Souk Road to the airport. Two buses travel along the routes: the(路线): the number 49 and the number 16. But by the time the number 16 bus reaches Souk Road, it is always full, so I can’t get on it, I have to wait for the number 49 because sometimes there are empty seats on it.
   The timetable says that there are buses from Souk Road to the airport every ten minutes. If this is true, why do I have to wait half an hour for a bus nearly every day?
   The rules say that if there are empty seats on a bus, the bus must stop at every stop where people are waiting Why do the half-empty buses go straight(一直)past me when I am standing at bus stop?
   The rules say that no bus may carry more than 40 seated passengers and 20 standing passengers. Yesterday I was the first to get off the bus when it reached the airport. I counted the other passengers as they got off. There were 129 people.
It is clear that our bus companies break the rules and think little of their passengers. Can nothing be done to make your service(服务) better?
                                                                                                          Yours
                                                                                               Tired passenger

已知复数$z_1,z_2$在复平面内对应的点分别为$A\left(0,1\right),B\left(-1,3\right)$，则$\frac{z_2}{z_1}=$ （ ）

临床上常给危重病人吸氧和点滴葡萄糖，这是为了给病人提供生存所需的能量，因为葡萄糖和氧可以在细胞的（  ）中转化放出能量．