如何使用Django ORM查询这个多对多的例子？

from django.db import models

class Student(models.Model):
    name = models.CharField(max_length=100)

    def __str__(self):
        return self.name

class Course(models.Model):
    name = models.CharField(max_length=100)
    students = models.ManyToManyField(Student, related_name='courses')

    def __str__(self):
        return self.name

student = Student.objects.get(name='张三')
courses = student.courses.all()

course = Course.objects.get(name='数学')
students = course.students.all()

student_count = Student.objects.annotate(course_count=Count('courses')).get(name='张三').course_count

course_count = Course.objects.annotate(student_count=Count('students')).get(name='数学').student_count

student = Student.objects.get(name='张三')
course = Course.objects.get(name='数学')
intersection = student.courses.filter(id=course.id)

student = Student.objects.get(name='张三')
course = Course.objects.get(name='数学')
union = student.courses.union(course.students.all())

student = Student.objects.get(name='张三')
course = Course.objects.get(name='数学')
difference = student.courses.exclude(id=course.id)