Which of the following is the correct treatment for Helicobacter pylori
选项：

A:It is recommended to start remedial treatment immediately after initial treatment failure;
B:Eradication therapy is not recommended for children under 14 years old with Helicobacter pylori infection;
C:At present, the first-line anti Helicobacter pylori program is PPI standard triple program;
D:At present, bismuth is recommended in our country as a quadruple solution, with a course of 7 days