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(b) ÐðÊö»ò×ܽáÑо¿½á¹ûµÄÄÚÈÝΪ¹ØÓÚ¹ýÈ¥µÄÊÂʵ£¬ËùÒÔͨ³£²ÉÓùýȥʱ¡£È磺After flights of less than two hours, 11% of the army pilots and 33% of the civilian pilots reported back pain.
(c) ¶ÔÑо¿½á¹û½øÐÐ˵Ã÷»òÓÉÆäµÃ³öÒ»°ãÐÔÍÆÂÛʱ£¬¶àÓÃÏÖÔÚʱ¡£È磺The higher incidence of back pain in civilian pilots may be due to their greater accumulated flying time.
(d) ²»Í¬½á¹ûÖ®¼ä»òʵÑéÊý¾ÝÓëÀíÂÛÄ£ÐÍÖ®¼ä½øÐбȽÏʱ£¬¶à²ÉÒ»°ãÏÖÔÚʱ£¨ÕâÖֱȽϹØÏµ¶àΪ²»ÊÜʱ¼äÓ°ÏìµÄÂß¼­ÉϵÄÊÂʵ£©¡£È磺These results agree well with the findings of Smith, et al.
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