Problem Thumbnail on dwqa question list, please help !

Designwall Hallo, how to remove the thumbnail in the "question list"? I have a problem, thumbnail that if opened via smartphone, he is to present it big, I yesterday to contact your support team, and he said that I have to add this code in css

media only screen and (max-width: 992px) {
.dwqa-container-question .dwqa .dwqa-header-author .dwqa img {
width: auto;
}
}

But it did not work, I want you to show how to eliminate the thumbnail images or overcome the above problems.

Note: If you want to see these issues please visit http://www.bagas.id/ask and you will see a large photo and unclear. Please help !