一道GMAT语法题
Among the objects found in the excavated temple were small terra-cotta effigies left by supplicants who were either asking the goddess Bona Dee's aid （划线） in healing physical and mental ills or thanking her for such help.(划线)
（A）in healing physical and mental ills or thanking her for such help
(E) to heal physical and mental ills or thanking her for such help
我就这两个答案搞不清楚,to do 不是表示目的嘛,求神的目的是疗伤,in healing 怎么又冒出来了.能不能帮我解释下 to do 和 in doing的区别