谁能帮我翻译一下这几句?翻译成英文或中文

1 He had been sick for a month, which made him lose a lot in his study.
2 The letter must be handed to him personally.
3 He highly might be rejected by the army for his weak eyesight.
4 Obviously, it's his assisstant who is running this bookshop.

1. He patients a month, making him the delay in learning a lot.
2. The letter must be handed over to his own
3. He is likely due to bad eyesight, but was refused enlistment
4. It is clear that his aides in the operation of thisbookstore

1 , his study was influnced because he has been sick for about month .
2, this letter must give him in person
3,he dot not allow to enter the service because his bad sight
4,it 's obvious that his assistor is runing his book store