（四）对证人及其近亲属进行威胁、侮辱、殴打或者打击报复的；
Цены на нефть взлетели до максимума за полгода17:55
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Venezuela's oil is also of poorer quality than its Saudi equivalent. Its sour, heavy crude is difficult to extract and refine, while its high sulphur content makes it corrosive to pipelines. A resurgence of Venezuela's industry could pose problems for Canada, which produces similarly viscous oil and exports much of it to the US, but analysts reckon the risk is minor.