A 26-year-old woman presents with arthralgia in the wrist and ankle joints for 6 months and a facial rash upon exposure to sunlight since summer. Examination in July reveals alopecia, irregular circular skin lesions on the face and neck with slightly raised edges, multiple superficial ulcers in the oral cavity, liver palpable 0.5 cm below the costal margin, and spleen just palpable below the costal margin. Laboratory tests show positive LE cells. According to the revised American Rheumatology criteria, she meets the diagnosis of systemic lupus erythematosus (SLE). Which of the following is correct regarding SLE treatment?