"Due to", "because of", and "thanks to" are all describing how an event happened. "Due to Thomas's laziness, he failed the class." How did he fail the class? He was lazy. "Thanks to good luck, David is rich." How did David become rich? He had good luck. "Because of the rainstorm, Bob could not play outside." Why could Bob not play outside? because it rained. All of these phrases can be used interchangeably (they can replace one another).

Due to illness, he was unable to go to work. He was unable to work because of his injury. Thanks to the doctor, he got well again.

becase of 意思是“因为”，后加名词或者名词性短语 due to意思是“因为”，后面加名词或者名词性短语，但是有预见性的原因。 thanks to中文最接近的意思应该是“幸亏 多亏了”