My hero is a doctor,who save my life when I could have died.In fact,she has saved quite a few

My hero is a doctor,who save(改为saved) my life when I could have died.
In fact,she(改为he,根据下文,此医生是男滴.) has saved quite a few children's lives.
At the age of five,I was serious(改为seriously) ill and my life was in danger.
My parents were all(改为both,指“两者都”.all指“三者或三者以上都”) worried if I could recover from the disease.
I was lucky enough to meet Dr.Jack,a great doctor,who is always east to talk.
He did lots of different tests to find (加上out,表示“找出”.为了找出救我的药,做了各种测试.find强调结果,指已经发现了的.) the medicine to cure me.
I owe to him that I am still alive.
Dr.Jack,he(改为who) has made a big difference to the lives of others,is respected by many people in our city.