go at sb
attack sb 攻击某人: They went at each other furiously. 他们互相猛烈攻击. go at sth make great efforts to do sth; work hard at sth 努力做某事物
They went at the job as if their lives depended on it. 他们拚命做这项工作.
The following day, however, the doctor consoled him by telling him that his chances of being able to leave hospital in time for New Year celebrations were good.