Refer to: to look at something or ask a person for information 查阅;参考;征询
You may refer to your notes if you want. 如果需要,可以查阅笔记.
to refer to a dictionary/an expert 查阅词典;征询专家的意见
go over something: to examine or check something carefully 仔细检查(或审查、查阅)某事
Go over your work before you hand it in. 把作业仔细检查后再交.
get to the bottom of something: to find out the real cause of something, especially something unpleasant 找到起因;挖出祸根