To study elementary particles, you must use extremely high energy. To understand the microstructure of matter, you must first change the microscopic matter, that is, you must find a way to break up these "small particles" such as atoms, nuclei, protons, and neutrons and break their interior Structure and various properties are exposed. What is the correct interpretation of the "microstructure of matter" and "microscopic matter"? ['The former refers to the internal combination mode of various small particles, and the latter refers to the various small particles that make up the substance.', 'The former refers to the atomic structure (including the nucleus), and the latter refers to these small particles such as protons and neutrons.', 'Both reflect the structure of the microscopic material world, that is, the small particle structure constitutes the microscopic material.', 'Both refer to molecules, atoms, protons, and neutrons that form matter.']