You may think too much. Whether in life or study, it is a good thing in itself if we can meet someone who is willing to help us. Everyone just left school or entered a new working environment, and they all need to learn from the people around them. Some people are excellent themselves, but they may be bad at words or unwilling to share themselves. Even if such people are excellent, they will not help the newcomers much. If we can meet someone who is excellent in all aspects and willing to help us, it will actually help us a lot. Whether a person can develop or not actually has a lot to do with what people around him are like. This may not mean anything, or it may just be because he is a good man himself, so you don't need to say thank you as much as you do when you need to say thank you. You are grateful inside. Whether you are a colleague or a friend, you still need to treat him sincerely in order to get sincerity.