Shandong prouince is one of the provinces in our Country in which the occurrence rate of locality thyroid gland goitre(LTD in short)is relative high and has affected population of about 20 million. The desease constitutes gveat harm for human health. The lack or excess of iodine element in geological environment is the main factor leading to LTD occurrence. The LTD pveualent in shandong province may be divided into two types of low iodine and high iodine. The low iodine LTD in shandong province are ...