The desk worker reads for a long time, writing is very easy to suffer from lumbar and cervical spine disease. To help these people prevent and alleviate lumbar and cervical spine disease, a unit union has issued a brochure for employees to teach you some ways to prevent and treat the lumbar and cervical spine. Which of the following, if true, would most question the effect of the above publicity? ['Methods to prevent and alleviate lumbar and cervical spine diseases vary from person to person.', 'The lumbar and cervical disease is difficult to self-prevent and treat (not mentioned).', 'Prevention and treatment of lumbar and cervical diseases require professional guidance (not mentioned).', 'People who work infrequently at the desk may also suffer from lumbar and cervical disease.']