Zack could not take David to the hospital, so he had to get a private doctor to come over and give David a thorough examination.

"The child is too young. His brain has been strongly stimulated, causing the intermittent memory loss he now has." The doctor's expression was gloomy.

"Is there any way to cure him?" Zack was skeptical and nervously asked.

"There is no specific treatment. The patient may suddenly remember everything one day, or he may not remember anything for the rest of his life." The doctor did not dare to give a definite answer.

Zack looked at David lying dazed in bed and slammed his fist into...