Writing prompt: Some Advice about Students' Symptom

Student essay:
They are always dizzy and tired,with sleeping not well very,what's worse,they cannot eat the amount of food which is necessary for them.I think the anxiety affects them badly,so I want to communicate with you about some advice for this symptom.
Firstly,they ought to make appropriate plans before the exam so that they can use the time fully and won't be anxious about going over the knowledge.
Secondly,because it is the good rest that help them be relaxed,and therefore,they should break as usual during the exam day
Thirdly,a warm bath or a milk which is good for sleeping.Always do them in the evening can also reduce the symptoms of anxiety.
Finally,in my view,the parents' encouragement that gives them energy also works.The more they are encouraged,the more relaxed they will be.
I am looking forword to hearing from you.

Corrected essay:
They are always dizzy and tired, with poor sleep. What's worse, they cannot eat the amount of food which is necessary for them. I think anxiety affects them badly, so I want to communicate with you about some advice for this symptom.
Firstly, they ought to make appropriate plans before the exam so that they can use the time fully and won't be anxious about going over the knowledge.
Secondly, because it is the good rest that helps them be relaxed, they should take breaks as usual during the exam day.
Thirdly, a warm bath or milk which is good for sleeping can help. Always doing these in the evening can also reduce the symptoms of anxiety.
Finally, in my view, parents' encouragement that gives them energy also works. The more they are encouraged, the more relaxed they will be.
I am looking forward to hearing from you.