The second question:

This part of the extended information mainly examines the knowledge points of indirect objects:

When there are two objects in a sentence, the one that refers to the object or thing is the direct object. People (or animals) are indirect objects. The indirect object refers to the affected thing or person, and the direct object is the receiver of the action. For example, in He Pass the Ball to me, Me is the indirect object and the ball is the direct object.

For example, there is a saying: "I teach him English." I teach him English. In this sentence, "he" is the indirect object and "English" is the direct object. There is another sentence: "I wrote a letter to my father yesterday." I wrote a letter yesterday. In this sentence, "father" is the indirect object and "a letter" is the direct object.

A direct object is an object that follows a transitive verb (or a phrase equivalent to a transitive verb). We launched the first artificial satellite in 1970. (1970 we launched the first man-made satellite. Among them, "the first artificial satellite" is the direct object of the transitive verb "launch".

I opened the door. I opened the door. Among them, "gate" is the direct object of the transitive verb "kaile". Indirect objects follow some transitive verbs (not all transitive verbs have indirect objects). Generally speaking, it refers to the person who benefits from the behavior indicated by the verb, such as: you send something to someone, or buy something for someone, etc.