To cure (为了治疗）
D
any 提示前面是否定,表示医生不需要任何帮助
于是可以排除A
剩下三个选项就是考你need的用法了
只能说 need help / don't need help / didn't need help 之类的,没有needn't any help 或者needed not any help 这种说法
若还有不明白的请追问什么情况下用curing老师说什么动词作主语用ING形式动名词也可以做主语，但是要看意思动名词做主语的例子：Reading books is good for us.这里表示 ”读书这件事对我们很好“， ”读书这件事“作为一个名词看待，所以用动名词To do 形式做主语就是强调目的，如：To make sure the students are safe, our school has built several school buses.为了确保同学们的安全，我们学校修了很多校车如果说”Making sure the students are safe, our school has built several school buses"就翻译不通了，意思不对Curing 开头的例子：Curing the cases of blindness is important.