Thatcher Lu-lam-chiok Margaret Hilda Thatcher ( Eng-gi : Margaret Hilda Thatcher, Baroness Thatcher ; 1925 ni 10 goe?h 13 ji?t – 2013 ni 4 goe?h 8 ji?t ) s? Lian-ha?p Ong-kok tui 1979 ni 5 goe?h 4 ji?t kau 1990 ni 11 goe?h 28 ji?t e siu-siong , s? 1975 ni kau 1990 ni Po-siu Tong e leng-t?.