Let AC and BD go to O.

∫ The quadrilateral ABCD is a diamond.

∴AC⊥BD,OD=？ BD=3，AO=？ AC=4

∴AD=AB=5

Let AH=α, then BH=5-α.

∵DH？ =AD？ Huh? =25-α?

DH？ =BD？ -BH？ =36-(5-α)?

∴25-α? =36-(5-α)?

α= 1.4，DH=√(25-α？ )=4.8

Dyskinesia of communication

∴AD∶AH=DG∶GH

5∶ 1.4 =(4.8- growth hormone) ∶ growth hormone

5GH= 1.4×4.8- 1.4GH

6.4GH = 1.4×4.8

GH= 1.05