在添加数字时，python/numpy中的浮点精度崩溃。

I have some problems due to really low numbers used with numpy. It took me several weeks to trace back my constant problems with numerical integration to the fact, that when I add up floats in a function the float64 precision gets lost. Performing the mathematically identic calculation with a product instead of a sum leads to values that are alright.I have some problems due to really low numbers