how to resize image of the news post

hi, I have been using the Catch box theme recently, it's really easy and nice to use, but recently I am frustrated by a problem: I have installed a plugin named auto-post, which can collect news from other website, it works well, but when each time the news is posted, the images of the news are totally uniformed-sized, which looked terrible... you can see the problem of my website from the following URL: http://www.ibitebi.net/爱比特币新闻/ Do know how the set the Catch box to make the image of the posted news look good? Can the Catch box support format the size of displaying images? your help is really high appreciated! Best Regards, Skywalker